Respiratory and muscular response to acute non-metabolic fatigue during ramp incremental cycling, 2019, Pogliaghi et al

Andy · Aug 25, 2019

Thought "The physiological response after acute non-metabolic fatigue suggests a link between exercise intolerance and the decreased ability to produce force." links in to the hand grip strength issues reported by the CureME team recently.

Highlights
• Static stretching and dropjumps caused acute non-metabolic fatigue
• Acute non-metabolic fatigue translated into augmented muscle myoelectric activity

• Augmented muscle activity required higher VO2 to sustain the same absolute workload

• Both maximal and submaximal indexes of exercise tolerance were impaired

• These findings suggest link between exercise tolerance and the ability to produce force
Abstract
We tested the hypothesis that acute, non-metabolic fatigue, by reducing maximal power output and possibly increasing muscle recruitment at a given exercise intensity, will reduce indexes of exercise tolerance during incremental cycling. Ten subjects performed three ramp incremental tests respectively after static stretching (STRC), dropjumps (DJ) or control (CTRL). Fatigue was assessed as reduction in maximal power output (sprintPO) during isokinetic sprints. During the ramps we measured: oxygen consumption (VO2), power output (PO), and surface electromyography. sprintPO was reduced after STRC and DJ (p = 0.007) yet not after CTRL. During the ramps, the interventions augmented muscle excitation vs CTRL (p ≤ 0.001). Peak PO and VO2 were reduced after STRC (302 ± 39W p = 0.033, 3365 ± 465 ml/min p = 0.015) and DJ (300 ± 37W p = 0.023, 3413 ± 476 ml/min p = 0.094) vsCTRL (314 ± 41W, 3505 ± 486 ml/min). Interventions were associated with early occurrence of the ventilatory thresholds and increased VO2 vs CTRL (p = 0.029). The physiological response after acute non-metabolic fatigue suggests a link between exercise intolerance and the decreased ability to produce force.
Click to expand...

Paywall, https://www.sciencedirect.com/science/article/pii/S156990481930165X
Sci hub, https://sci-hub.se/10.1016/j.resp.2019.103281

ETA: Added Sci hub link.

Snow Leopard · Aug 25, 2019

This is available now BTW.

Andy · Aug 25, 2019

Added Sci hub link to first post in this thread.

Log in or Sign up

Respiratory and muscular response to acute non-metabolic fatigue during ramp incremental cycling, 2019, Pogliaghi et al

Andy Committee Member

Snow Leopard Senior Member (Voting Rights)

Andy Committee Member

Share This Page

Log in or Sign up

Respiratory and muscular response to acute non-metabolic fatigue during ramp incremental cycling, 2019, Pogliaghi et al

Andy Committee Member

Snow Leopard Senior Member (Voting Rights)

Andy Committee Member

Share This Page

Useful Searches