. Lowe, the saddle vertical force dramatically decreased, which may have triggered the sit-to-stand transition This spontaneous transition occurred at minimum saddle vertical force of about 1 N.kg -1 . Furthermore, the strong relationship between saddle vertical force and cycling power for a given pedaling cadence suggests that SSTP can be predicted. Non-optimal behaviors were observed around the power corresponding to SSTP by studying handlebar and pedal forces, suggesting that the spontaneous choice to rise in the standing position may be a solution to reduce these constraints. In addition, this study suggests that improving bike settings and considering the specificities imposed by high force pedaling on the whole body during training may improve cycling performance, Clinicians, researchers, and manufacturers trying to understand the etiology of groin injuries and erectile dysfunction associated with cycling (Bressel and Larson, 2003.

. Bressel, 2010) should also consider the factors associated with saddle forces

F. Bolourchi and M. A. Hull, Measurement of Rider Induced Loads during Simulated Bicycling, International Journal of Sport Biomechanics, vol.1, issue.4, pp.308-329, 1985.
DOI : 10.1123/ijsb.1.4.308

E. Bressel and B. J. Larson, Bicycle Seat Designs and Their Effect on Pelvic Angle, Trunk Angle, and Comfort, Medicine & Science in Sports & Exercise, vol.35, issue.2, pp.327-332, 2003.
DOI : 10.1249/01.MSS.0000048830.22964.7c

E. Bressel, D. Nash, and D. Dolny, Association between Attributes of a Cyclist and Bicycle Seat Pressure, The Journal of Sexual Medicine, vol.7, issue.10, pp.3424-3433, 2010.
DOI : 10.1111/j.1743-6109.2010.01905.x

F. P. Carpes, F. Dagnese, J. F. Kleinpaul, E. Martins, and C. B. Mota, Bicycle Saddle Pressure: Effects of Trunk Position and Saddle Design on Healthy Subjects, Urologia Internationalis, vol.82, issue.1, pp.8-11, 2009.
DOI : 10.1159/000176017

E. F. Coyle, M. E. Feltner, S. A. Kautz, M. T. Hamilton, S. J. Montain et al., Physiological and biomechanical factors associated with elite endurance cycling performance, Medicine & Science in Sports & Exercise, vol.23, issue.1, pp.93-107, 1991.
DOI : 10.1249/00005768-199101000-00015

L. M. Edwards, S. A. Jobson, S. R. George, S. H. Day, and A. M. Nevill, Whole-body efficiency is negatively correlated with minimum torque per duty cycle in trained cyclists, Journal of Sports Sciences, vol.26, issue.4, pp.319-325, 2009.
DOI : 10.1007/s00421-005-0077-5

T. Korff, L. M. Romer, I. Mayhew, and J. C. Martin, Effect of Pedaling Technique on Mechanical Effectiveness and Efficiency in Cyclists, Medicine & Science in Sports & Exercise, vol.39, issue.6, pp.991-995, 2007.
DOI : 10.1249/mss.0b013e318043a235

B. D. Lowe, S. M. Schrader, and M. J. Breitenstein, Effect of Bicycle Saddle Designs on the Pressure to the Perineum of the Bicyclist, Medicine & Science in Sports & Exercise, vol.36, issue.6, pp.1055-1062, 2004.
DOI : 10.1249/01.MSS.0000128248.40501.73

J. Mcdaniel, N. S. Behjani, S. J. Elmer, N. A. Brown, and J. C. Martin, Joint-Specific Power-Pedaling Rate Relationships during Maximal Cycling, Journal of Applied Biomechanics, vol.30, issue.3, pp.423-430, 2014.
DOI : 10.1123/jab.2013-0246

J. Mcdaniel, A. Subudhi, and J. C. Martin, Torso Stabilization Reduces the Metabolic Cost of Producing Cycling Power, Canadian Journal of Applied Physiology, vol.83, issue.4, pp.433-441, 2005.
DOI : 10.1007/BF01746509

C. Wilson and T. R. Bush, Interface forces on the seat during a cycling activity, Clinical Biomechanics, vol.22, issue.9, pp.1017-1023, 2007.
DOI : 10.1016/j.clinbiomech.2007.06.004