The methodology will follow a Home-based, online, double-blinded, randomised, long-term design. The participants recruited will be active, middle-aged and older healthy adults. The supplement intake will be a Pre-workout supplement intake or a placebo intake. The exercise training will be a Progressive Resistance Training, with sessions of \~1 hour (3 times/week). The intervention will last for a minimum of one year and the possibility to prolong it to another one (two years of intervention) if the adherence to the treatment was higher to the 75% of the participants (of, at least, 85% of the training sessions and supplementation intake).
The outcomes that will be assessed are: Body composition (fat mass and fat-free mass), physical performance (short test designed by Go Fit Lab: single-leg standing balance, upper-body strength - maximum number of push-ups repetitions in 15 seconds -, lower-body mechanical power - vertical jump -, agility/velocity - 30 seconds of static running at maximum velocity -, recovery assessment - 60 seconds monitoring of heart rate after the previous test -), Happiness Score (designed by Go Fit, including different self-reported validated tests, such as: Par-Q+, ACSM Cardiovascular Risk Factors Questionnaire, SF-12 for quality of life and self-perceived health status, PSS-4 Stress and mental health, Pittsburgh Sleeping Quality test, PREDIMED test: adherence to Mediterranean diet eating patterns, and the IPAQ short form), and for every workout: Self-perceived energy feeling (Questionnaire: Energy Level, Fatigue, Alertness and Focus for the Task), Rate of Perceived Exertion (OMNI RES Scale and Borg Scale) and adherence to regular physical exercise practise, healthy nutritional patterns, and supplement intake.
