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Julien Tripette, PhD

Bio

I am a versatile researcher in physical activity, sports science and human engineering. I obtained a PhD in exercise physiology from the French West Indies and Guiana University (now called French West Indies University). I also completed my undergraduate and master's studies in sport science at Lyon 1 University. I have gradually shifted my research focus from clinical exercise physiology to the evaluation of physical behaviors. My current research focuses on the development of new hardware and software methods for measuring physical behaviors and explore the relationship between physical activity and health.

My current research activities include:

• Designing smart living environments to assess and promote physical activity at home.
• Developping algorithms to help wearable device to recognize physical behaviors and evaluate energy expenditure.
• Assessing physical activity in sickle cell anemia patients, exploring the relationship with symptoms.
• Some skateboard studies.

Job history

2021 - …	Associate professor at Ochanomizu University, Department of Human-Environmental Sciences, Center for Interdiscipinary AI and Data Science. Visiting Researcher at NIBIOHN.
2020 - 2021	Researcher at NIBIOHN.
2014 - 2020	Project associate professor at Ochanomizu University, Leading Graduate School.
2012 - 2014	Postdoctoral fellow at NIBIOHN [2012-2013: FRSQ fellow, 2013-2014: JSPS fellow].
2009 - 2012	Postdoctoral fellow at CRCHUM, LBUM.

Education

2005 - 2008	PhD in Sports Science, French West Indies and Guiana University Sickle cell trait carrier and physical exercise: hemorheological and vascular abnomalities
2002 - 2005	Master's degree in Sports Science, Lyon 1 University
1999 - 2001	Bachelor's degree in Sports Science, Lyon 1 University

Hobbies & lifestyle

I like swimming, especially in open water, outdoor activities, boardsports (skiing, snowboarding, surfing...) and camping in the wild (well it has been a while !!). I used to play ice hockey at national level [Lyon Hockey Club, vintage picture coming soon]. I enjoy learning new motor skills and am currently focusing on progressing in both skateboarding and piano. I am also an active travelling enthusiast with >3000km completed every year on my mamachari bicycle.

Bibliography

Articles

1. Diaw, M., Coly, M. S., Charlot, K., Gallou-Guyot, M., Miyachi, M., Yoshida, T., Macoura, G., Diop, S., Faye, B. F., Mbengue, A., Samb, A., Skinner S., Nader, E., Ranque, B., Connes, P., & Tripette, J. (2025). Physical activity, vaso-occlusive crises and pain in patients with sickle cell anaemia in Senegal. British Journal of Haematology, In-press. DOI URL PDF
2. Nakajima, Y., Kitayama, A., Ohta, Y., Motooka, N., Kuno-Mizumura, M., Miyachi, M., Tanaka, S., Ishikawa-Takata, K., & Tripette, J. (2024). Objective Assessment of Physical Activity at Home Using a Novel Floor-Vibration Monitoring System: Validation and Comparison With Wearable Activity Trackers and Indirect Calorimetry Measurements. JMIR formative research, 8, e51874. DOI URL PDF
3. Yamada, Y., Yoshida, T., Murakami, H., Gando, Y., Kawakami, R., Ohno, H., Tanisawa, K., Konishi, K., Tripette, J., Kondo, E., Nakagata, T., Nanri, H., & Miyachi, M. (2023). Body Cell Mass to Fat-Free Mass Ratio and Extra- to Intracellular Water Ratio Are Related to Maximal Oxygen Uptake. The journals of gerontology. Series A, Biological sciences and medical sciences, 78(10), 1778–1784. DOI URL PDF
4. Anzai, E., Ren, D., Cazenille, L., Aubert-Kato, N., Tripette, J., & Ohta, Y. (2022). Random forest algorithms to classify frailty and falling history in seniors using plantar pressure measurement insoles: a large-scale feasibility study. BMC geriatrics, 22(1), 746. DOI URL PDF
5. Yamada, Y., Yoshida, T., Murakami, H., Kawakami, R., Gando, Y., Ohno, H., Tanisawa, K., Konishi, K., Julien, T., Kondo, E., Nakagata, T., Nanri, H., & Miyachi, M. (2022). Phase angle obtained via bioelectrical impedance analysis and objectively measured physical activity or exercise habits. Sci Rep, 12(1), 17274. DOI URL PDF
6. Nakagata, T., Murakami, H., Kawakami, R., Tripette, J., Nakae, S., Yamada, Y., Ishikawa-Takata, K., Tanaka, S., & Miyachi, M. (2022). Step-count outcomes of 13 different activity trackers: Results from laboratory and free-living experiments. Gait & posture, 98, 24–33. DOI URL PDF
7. Tripette, J., Gando, Y., Murakami, H., Kawakami, R., Tanisawa, K., Ohno, H., Konishi, K., Tanimoto, M., Tanaka, N., Kawano, H., Yamamoto, K., Morishita, A., Iemitsu, M., Sanada, K., Miyatake, N., & Miyachi, M. (2021). Effect of a 1-year intervention comprising brief counselling sessions and low-dose physical activity recommendations in Japanese adults, and retention of the effect at 2 years: a randomized trial. BMC sports science, medicine & rehabilitation, 13(1), 133. URL
8. Ren, D., Aubert-Kato, N., Anzai, E., Ohta, Y., & Tripette, J. (2020). Random forest algorithms for recognizing daily life activities using plantar pressure information: a smart-shoe study. PeerJ, 8, e10170. DOI URL PDF DATA CODE
9. Ouédraogo, V., Connes, P., Tripette, J., Tiendrébéogo, A. J. F., Sow, A. K., Diaw, M., Seck, M., Diop, M., Hallab, M., Belue, R., Samb, A., Ba, A., & Lefthériotis, G. (2018) Pulse wave velocity is lower in trained than in untrained sickle cell trait carriers. Clin Hemorheol Microcirc, 69(3), 417-424. DOI URL
10. Tripette, J., Murakami, H., Hara, H., Kawakami, R., Gando, Y., Ohno, H., Miyatake, N., & Miyachi, M. (2018) Caffeine Consumption Is Associated With Higher Level of Physical Activity in Japanese Women. Int J Sport Nutr Exerc Metab. 28(5), 474-479. DOI URL
11. Tripette, J., Murakami, H., Ryan, K.R., Ohta, Y., & Miyachi, M. (2017). The contribution of Nintendo Wii Fit series in the field of health: a systematic review and meta-analysis. PeerJ, 5, e3600. DOI URL PDF
12. Kusuda, K., Yamashita, K., Ohnishi, A., Tanaka, K., Masaru, K., Honda, H., Tanaka, S., Okubo, T., Tripette, J., & Ohta, Y. (2016). Management of surgical instruments with radio frequency identification tags: A 27-month in hospital trial. International Journal of Health Care Quality Assurance., 29(2), 236-47. DOI URL
13. "+10 min of physical activity per day": Japan wants feasible and efficient recommendations for its population. J Nutr Sci Vitaminol, 2015;61, Suppl:S7-9. DOI URL PDF
14. Tripette, J., Nguyen, L.C., Allard, L., Robillard, P., Soulez, G., & Cloutier, G. (2015). In-vivo ultrasonic measurement of RBC aggregation in diabetic patients: a pilot study. Plos One, 10(4), e0124712 DOI URL PDF
15. Miyachi, M., Kurita, S., Tripette, J., Takahara, R., Yagi, Y., & Murakami, H. (2015). Installation of a stationary high desk in the workplace: effect of 6-weeks intervention on physical activity. BMC Public Health, 15, 368. DOI URL PDF
16. Murakami, H., Tripette, J., Kawakami, R., & Miyachi, M. (2015). "Add 10 min for your health": the new Japanese recommendation for physical activity based on dose-response analysis. Journal of the American College of Cardiology, 65(11), 1153–1154. DOI URL PDF
17. Tripette, J., Murakami, H., Ando, T., Kawakami, R., Tanaka, N., Tanaka, S., & Miyachi, M. (2014). Wii Fit U intensity and enjoyment in adults. BMC research notes, 7, 567. DOI URL PDF
18. Tripette, J., Ando, T., Murakami, H., Yamamoto, K., Ohkawara, K., Tanaka, S., & Miyachi, M. (2014). Evaluation of active video games intensity: comparison between accelerometer-based predictions and indirect calorimetric measurements. Technology and health care : official journal of the European Society for Engineering and Medicine, 22(2), 199–208. PDF URL
19. Mfoumou, E., Tripette, J., Blostein, M., & Cloutier, G. (2014). Time-dependent hardening of blood clots quantitatively measured in vivo with shear-wave ultrasound imaging in a rabbit model of venous thrombosis. Thrombosis research, 133(2), 265–271. DOI URL
20. Tripette, J., Murakami, H., Gando, Y., Kawakami, R., Sasaki, A., Hanawa, S., Hirosako, A., & Miyachi, M. (2014). Home-based active video games to promote weight loss during the postpartum period. Medicine and science in sports and exercise, 46(3), 472–478. PDF URL PDF
21. Diaw, M., Connes, P., Samb, A., Sow, A. K., Sall, N. D., Sar, F. B., Ba, A., Diop, S., Niang, M. N., & Tripette, J. (2013). Intraday blood rheological changes induced by Ramadan fasting in sickle cell trait carriers. Chronobiology international, 30(9), 1116–1122. PDF URL
22. Tripette, J., Denault, A. Y., Allard, L., Chayer, B., Perrault, L. P., & Cloutier, G. (2013). Ultrasound monitoring of RBC aggregation as a real-time marker of the inflammatory response in a cardiopulmonary bypass swine model. Critical care medicine, 41(8), e171–e178. DOI URL
23. Tripette, J., Hardy-Dessources, M. D., Romana, M., Hue, O., Diaw, M., Samb, A., Diop, S., & Connes, P. (2013). Exercise-related complications in sickle cell trait. Clinical hemorheology and microcirculation, 55(1), 29–37. PDF URL
24. Messonnier, L., Samb, A., Tripette, J., Gogh, B.D., Loko, G., Sall, N.D., Féasson, L., Hue, O., Lamothe, S., Bogui, P., & Connes, P. (2011). Moderate endurance exercise is not a risk for rhabdomyolysis or renal failure in sickle cell trait carriers. Clin Hemorheol Microcirc, 51(3), 193-202. DOI URL
25. Connes, P., Pichon, A., Hardy-Dessources, M. D., Waltz, X., Lamarre, Y., Simmonds, M. J., & Tripette, J. (2012). Blood viscosity and hemodynamics during exercise. Clinical hemorheology and microcirculation, 51(2), 101–109. DOI URL
26. Simmonds, M. J., Tripette, J., Sabapathy, S., Marshall-Gradisnik, S. M., & Connes, P. (2011). Cardiovascular dynamics during exercise are related to blood rheology. Clinical hemorheology and microcirculation, 49(1-4), 231–241. DOI URL
27. Tripette, J., Hardy-Dessources, M. D., Beltan, E., Sanouiller, A., Bangou, J., Chalabi, T., Chout, R., Hedreville, M., Broquere, C., Nebor, D., Dotzis, G., Hue, O., & Connes, P. (2011). Endurance running trial in tropical environment: a blood rheological study. Clinical hemorheology and microcirculation, 47(4), 261–268. DOI URL
28. Chaar, V., Romana, M., Tripette, J., Broquere, C., Huisse, M. G., Hue, O., Hardy-Dessources, M. D., & Connes, P. (2011). Effect of strenuous physical exercise on circulating cell-derived microparticles. Clinical hemorheology and microcirculation, 47(1), 15–25. DOI URL
29. Yu, F. T., Armstrong, J. K., Tripette, J., Meiselman, H. J., & Cloutier, G. (2011). A local increase in red blood cell aggregation can trigger deep vein thrombosis: evidence based on quantitative cellular ultrasound imaging. Journal of thrombosis and haemostasis : JTH, 9(3), 481–488. DOI URL PDF
30. Beltan, E., Chalabi, T., Tripette, J., Chout, R., & Connes, P. (2011). Coagulation responses after a submaximal exercise in sickle cell trait carriers. Thrombosis research, 127(2), 167–169. DOI URL
31. Tripette, J., Loko, G., Samb, A., Gogh, B. D., Sewade, E., Seck, D., Hue, O., Romana, M., Diop, S., Diaw, M., Brudey, K., Bogui, P., Cissé, F., Hardy-Dessources, M. D., & Connes, P. (2010). Effects of hydration and dehydration on blood rheology in sickle cell trait carriers during exercise. American journal of physiology. Heart and circulatory physiology, 299(3), H908–H914. DOI URL PDF
32. Tripette, J., Connes, P., Hedreville, M., Etienne-Julan, M., Marlin, L., Hue, O., & Hardy-Dessources, M. D. (2010). Patterns of exercise-related inflammatory response in sickle cell trait carriers. British journal of sports medicine, 44(4), 232–237. DOI URL
33. Tripette, J., Connes, P., Beltan, E., Chalabi, T., Marlin, L., Chout, R., Baskurt, O. K., Hue, O., & Hardy-Dessources, M. D. (2010). Red blood cell deformability and aggregation, cell adhesion molecules, oxidative stress and nitric oxide markers after a short term, submaximal, exercise in sickle cell trait carriers. Clinical hemorheology and microcirculation, 45(1), 39–52. DOI URL
34. Alexy, T., Sangkatumvong, S., Connes, P., Pais, E., Tripette, J., Barthelemy, J. C., Fisher, T. C., Meiselman, H. J., Khoo, M. C., & Coates, T. D. (2010). Sickle cell disease: selected aspects of pathophysiology. Clinical hemorheology and microcirculation, 44(3), 155–166. DOI URL PDF
35. Tripette, J., Alexy, T., Hardy-Dessources, M. D., Mougenel, D., Beltan, E., Chalabi, T., Chout, R., Etienne-Julan, M., Hue, O., Meiselman, H. J., & Connes, P. (2009). Red blood cell aggregation, aggregate strength and oxygen transport potential of blood are abnormal in both homozygous sickle cell anemia and sickle-hemoglobin C disease. Haematologica, 94(8), 1060–1065. DOI URL PDF
36. Connes, P., Tripette, J., Mukisi-Mukaza, M., Baskurt, O. K., Toth, K., Meiselman, H. J., Hue, O., & Antoine-Jonville, S. (2009). Relationships between hemodynamic, hemorheological and metabolic responses during exercise. Biorheology, 46(2), 133–143. DOI URL
37. Uyuklu, M., Cengiz, M., Ulker, P., Hever, T., Tripette, J., Connes, P., Nemeth, N., Meiselman, H. J., & Baskurt, O. K. (2009). Effects of storage duration and temperature of human blood on red cell deformability and aggregation. Clinical hemorheology and microcirculation, 41(4), 269–278. DOI URL
38. Connes, P., Uyuklu, M., Tripette, J., Boucher, J. H., Beltan, E., Chalabi, T., Yalcin, O., Chout, R., Hue, O., Hardy-Dessources, M. D., & Baskurt, O. K. (2009). Sampling time after tourniquet removal affects erythrocyte deformability and aggregation measurements. Clinical hemorheology and microcirculation, 41(1), 9–15. DOI URL
39. Monchanin, G., Serpero, L. D., Connes, P., Tripette, J., Wouassi, D., Francina, A., Massarelli, R., Gozal, D., Thiriet, P., & Martin, C. (2008). Plasma levels of adhesion molecules ICAM-1 and VCAM-1 in athletes with sickle cell trait with or without alpha-thalassemia during endurance exercise and recovery. Clinical hemorheology and microcirculation, 40(2), 89–97. URL
40. Hédreville, M., Barthélémy, J. C., Tripette, J., Roche, F., Hardy-Dessources, M. D., Pichot, V., Hue, O., & Connes, P. (2008). Effects of strenuous exercise on autonomic nervous system activity in sickle cell trait carriers. Autonomic neuroscience : basic & clinical, 143(1-2), 68–72. DOI URL
41. Connes, P., Hue, O., Tripette, J., & Hardy-Dessources, M. D. (2008). Blood rheology abnormalities and vascular cell adhesion mechanisms in sickle cell trait carriers during exercise. Clinical hemorheology and microcirculation, 39(1-4), 179–184. URL
42. Connes, P., Tripette, J., Chalabi, T., Beltan, E., Etienne-Julan, M., Chout, R., Hue, O., & Hardy-Dessources, M. D. (2008). Effects of strenuous exercise on blood coagulation activity in sickle cell trait carriers. Clinical hemorheology and microcirculation, 38(1), 13–21. URL
43. Marlin, L., Connes, P., Antoine-Jonville, S., Tripette, J., Montout-Hedreville, M., Sanouiller, A., Etienne-Julan, M., & Hue, O. (2008). Cardiorespiratory responses during three repeated incremental exercise tests in sickle cell trait carriers. European journal of applied physiology, 102(2), 181–187. DOI URL
44. Tripette, J., Hardy-Dessources, M. D., Sara, F., Montout-Hedreville, M., Saint-Martin, C., Hue, O., & Connes, P. (2007). Does repeated and heavy exercise impair blood rheology in carriers of sickle cell trait?. Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine, 17(6), 465–470. DOI URL
45. Monchanin, G., Serpero, L. D., Connes, P., Tripette, J., Wouassi, D., Bezin, L., Francina, A., Ngongang, J., de la Peña, M., Massarelli, R., Gozal, D., Thiriet, P., & Martin, C. (2007). Effects of progressive and maximal exercise on plasma levels of adhesion molecules in athletes with sickle cell trait with or without alpha-thalassemia. Journal of applied physiology (Bethesda, Md. : 1985), 102(1), 169–173. DOI URL PDF

Proceedings

1. Tripette J., Sasaki M., Kuno-Mizumura M., Motooka N., and Ohta Y. (2021). Monitoring floor vibrations to evaluate objectively physical activity during housework activities. 2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech), Nara, Japan, 2021, pp. 97-101. DOI URL
2. Anzai E., Tripette J., Nakajima N., and Ohta Y. (2020). Comparative study between a novel 7-sensor plantar pressure measurement insole and the F-scan device. 2020 IEEE 2nd Global Conference on Life Sciences and Technologies (LifeTech), Kyoto, Japan, 2020 , pp. 339-342. DOI URL
3. Montagnon E., Tripette J., Mfoumou E., and Cloutier G. (2012). Acoustic radiation force induced elastography (ARFIRE): A new method to characterize blood clot viscoelastic properties. 2012 IEEE Ultrasonics Symposium, Dresden, Germany, October, 2012, pp. 13-16. DOI URL
4. G. Cloutier, L. Allard, B. Chayer, J. Tripette, L. P. Perrault and Denault A. Y. (2010). In-vivo and real-time ultrasonic monitoring of red blood cell aggregation with the structure factor size and attenuation estimator during and after cardiopulmonary bypass surgery in swine, 2010 IEEE International Ultrasonics Symposium, San Diego, CA, USA, 2010, pp. 616-619. PDF URL
5. Nguyen L. C., Tripette J., Franceschini E., Chiasson J. L., Robillard P., Soulez G., and Cloutier G. (2010). In-situ characterization of red blood cell aggregation measured with high frequency ultrasound in type 2 diabetic patients. 2010 IEEE International Ultrasonics Symposium, San Diego, CA, USA, pp. 612-615. PDF URL

Book chapters

1. Connes P., Beltan E., Chalabi T., Tripette J. (2009). Effects of exercise on blood coagulation activity in sickle cell trait carriers: abnormalities or not?. In: Handbook of Hematology Research – Blood Coagulation: Hemorheology, Hemophilia and Blood Coagulation (Editors: Tondre R, Lebegue C, Sartori MT, Chu AJ, Mindukshev IV; Edition: Nova Science Publisher).

Inventions / patents

1. Ohta Yuji, Tripette Julien, Aubert-Kato Nathanael, Ren Dian. (2022). Behavior determination apparatus, behavior determination system, behavior determination method, and computer-readable storage medium. status: pending. US :US20220280074A1. Japan: PCT/JP2019/046859. World Intellectual Property Organization: WO2021106216A1 PATENT

Dataset

1. Ren, D., Aubert-Kato, N., Anzai, E., Ohta, Y., & Tripette, J. (2020). Data for: "Random forest algorithms for recognizing daily life activities using plantar pressure information: A smart-shoe study" [Data set]. In PeerJ. Zenodo. DOI REPOS.

Preprints

1. Tripette, J., & Ohta, Y. (2024). Health, time, and financial co-benefits of active travelling: a case report of one cyclist in the Tokyo metropolitan area. SportRxiv, 493. DOI URL PDF.

List of co-authors

→ Full record of achievements here.

→ Additional information here.