Table 1.

PICOS (participants, interventions, comparisons, outcomes, study design)

PICOS component	Details
Participants	Healthy humans aged: > 40 and < 85 years
Interventions	Exercise training with two or more weeks of follow-up
Comparisons	Control group/Untrained participants
Outcomes	Physical performances, anabolic/catabolic hormone responses
Study designs	nRCTs, nRnCTs and RCTs

nRCT non-randomized controlled trial, nRnCT non-randomized non-controlled trial, RCT randomized controlled trial