Running mechanics adjustments to perceptually-regulated interval runs in hypoxia and normoxia

Look to the stars—Is there anything that public health and rehabilitation can learn from elite sports?

“…For injured or in-rehabilitation athletes, several methods have been developed to decrease the mechanical load and enable exercise despite biomechanical constraints or pain like: running at relative lower body weight on a Low-Gravity treadmill ( 88 ), on a water immersion treadmill ( 89 ), uphill ( 90 ) or in hypoxia ( 91 ). The knowledge acquired on the physiological responses in such conditions may be useful for many clinical populations with locomotion limitation; for example for patients who are subject to excessive body weight ( 92 ) and/or elderly patients ( 93 ).…”

Acute intense fatigue does not modify the effect of EVA and TPU custom foot orthoses on running mechanics, running economy and perceived comfort

“…Peak braking and peak push-off forces (BW) along with duration of braking and push-off phases (s) were determined. Finally, average vertical loading rate (BW/s) was calculated as the mean value of the time-derivate of vertical force signal within the first 50 ms of the support phase (Li et al 2020 ).…”

“…After a 10 min warm-up at 10 km/h, followed by a 3 min break used to put on the mask to collect expired gases, participants ran for 6 min at the speed associated with their first ventilatory threshold (13.8 ± 1.1 km/h) whereby running mechanics, RE and perceived comfort were evaluated. Participants were then allowed 5 min to rest in a standing position prior to undertaking a fatiguing task that consisted of performing eight, 5 s sprints separated by 25 s of rest (Girard et al 2020). Lastly, 2 min after the termination of the fatiguing task, participants repeated the 6 min run trial.…”

“…Tolerance to ground impact is often compromised as fatigue appears, which in turn may limit performance and/or increase injury risk, notably by increasing the magnitude and rate of loading (Li et al 2020). To date, little attention has been paid to the effectiveness of CFOs at reducing impact loading in situations of intense fatigue (i.e., repeated 'all out' efforts; Girard et al 2020), with participants typically tested in 'fresh' conditions only. Reportedly, CFOs reduced plantar loading under the hallux, medial midfoot, and lateral midfoot compared to prefabricated insoles by ~ 30-35% post-fatigue (12 min at treadmill speed of ~ 14.4 km/h) (Lucas-Ceuvas et al 2014).…”

“…Tolerance to ground impact is often compromised as fatigue appears, which in turn may limit performance and/or increase injury risk, notably by increasing the magnitude and rate of loading (Li et al 2020 ). To date, little attention has been paid to the effectiveness of CFOs at reducing impact loading in situations of intense fatigue (i.e., repeated ‘all out’ efforts; Girard et al 2020 ), with participants typically tested in ‘fresh’ conditions only.…”