Effects of a Pre-Workout on Performance, Perceptual Responses, Energy Feelings and Muscular Properties, After a Training Microcycle in Adults.
Effects of a Pre-Workout on Performance, Perceptual Responses, Energy Feelings and Muscular Properties, After a Training Microcycle in Adults.
The investigation will be conducted as a double blinded, randomized, crossover
 within-participant comparison design with two 1-week intervention periods separated by
 2-weeks for wash out, recovery, period.
Following inclusion, familiarization and baseline assessments, the participants will be
 randomly allocated to receive either a multi-ingredient, pre-workout supplement (PREW) or
 maltodextrin (CHO). Thereafter, the participants will take a 5-day microcycle, involving
 three resistance training sessions (Monday, Wednesday and Friday) intercalated with two
 endurance training sessions (Tuesday and Thursday). After the first interventional
 microcycle, and the 2-week washout period, the participants will switch to the other
 nutritional condition for continuation with the second 5-day identical microcycle.
 Assessments of muscle contractile properties via Tensiomyography on Vastus Medialis, Biceps
 Femoris Long Head and Anterior Deltoids will be taken before and after each resistance
 training session. Measurements of strength (Isometric Mid Thigh Pull) upper and lower body
 muscular power (Medicine Ball Throw and Vertical Jump) will be performed immediately after
 each resistance training workout. The supplements will be ingested 15 min before each
 training session, just before completing an energy feeling questionnaire. In addition, the
 perceptual response to training will be assessed during and 20 min after the completion of
 all workouts. The contribution of carbohydrate and fat metabolism will be estimated using a
 gas analyzer via the calculation of respiratory exchange ratio the (RER) during each
 endurance training session.
Inclusion Criteria:

 -  Healthy (no current injuries).

 -  Between 45 and 70 years old.

 -  Active.

 Exclusion Criteria:

 -  Injuries.

 -  Never trained before.

 -  Under 45 or over 70 years old.