The investigation will be conducted as a double blinded, randomized, parallel between treatment conditions comparison design with two different groups ingesting a different supplement each one.
Following inclusion, familiarization and baseline assessments, the participants will be randomly allocated to receive either a multi-ingredient, post-workout supplement (REC) or maltodextrin (CHO). Thereafter, the participants will follow a 6-weeks resistance training mesocycle, involving three resistance training sessions (Monday, Wednesday and Friday) per week (18 sessions in total). Before and after the 6 weeks of intervention, the following assessments will be performed: (i) Body composition (fat mass and fat-free mass) via air displacement plethysmography (BodPod); (ii) muscle contractile properties on Vastus Medialis and Anterior Deltoids (via Tensiomyography; (iii) muscle structure of the Vastus Lateralis of the Quadriceps and the Elbow Flexors of dominant extremities via Ultrasound; (iv) Maximal Isometric Strength (Isometric Mid-Thigh Pull); (v) Upper and Lower Body Muscular Power (Medicine Ball Throw and Vertical Jump), (vi) Upper and Lower Muscular Endurance (30- Seconds Sit-to-Stand and 30-Seconds 16RM Bench Press), (vii) Immune System (via HemoCue WBC DIFF System). The supplements will be ingested immediately (within 15 min) after each training session. Energy Feeling Questionnaire will be filled immediately before warming up. In addition, Rate of Perceived Exertion to training will be assessed 15 min after the completion of all workouts.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
20
The Post-Workout Supplement is administered 15 minutes after the completion of training sessions. No supplementation is administered in non-training days. The Resistance Training is performed in alternate days. The training Protocol is: 10 minutes of standardized warm-up, Strength Circuit training using free weights (Alternate Box Step-Ups, Bench Press; Parallel Squat; Up-right Row; Deadlift; Alternate Lunges; Shoulder Press; Leg Extension). The participants perform 16 repetitions of each exercise, with 30 seconds rest and 3 minutes rest after every set. If they can complete 16 repetitions easily, 2.5 to 5 kg are added for the next set. Also, whole-body Perceptual Response is assessed using the 0-10 OMNI-RES Scale, after every set and 15 minutes after finishing.
The Maltodextrin Supplement is administered 15 minutes after the completion of training sessions. No supplementation is administered in non-training days. The Resistance Training is performed in alternate days. The training Protocol is: 10 minutes of standardized warm-up, Strength Circuit training using free weights (Alternate Box Step-Ups, Bench Press; Parallel Squat; Up-right Row; Deadlift; Alternate Lunges; Shoulder Press; Leg Extension). The participants perform 16 repetitions of each exercise, with 30 seconds rest and 3 minutes rest after every set. If they can complete 16 repetitions easily, 2.5 to 5 kg are added for the next set. Also, whole-body Perceptual Response is assessed using the 0-10 OMNI-RES Scale, after every set and 15 minutes after finishing.
University of Greenwich, Avery Hill Campus, Sparrows Farm. Avery Hill, London., United Kingdom, SE9 2BT
London, Avery Hill, London., United Kingdom
Vertical Jump
Height (measured in centimetres)
Time frame: Changes from 3 days previous to, and 3 days after the completion of the 6-weeks training program
Chest Medicine Ball Throw
Distance (measured in centimetres)
Time frame: Changes from 3 days previous to, and 3 days after the completion of the 6-weeks training program
Muscle Thickness
Thickness of the Vastus Lateralis and the Elbow Flexors of the dominant limbs
Time frame: Changes from 3 days previous to, and 3 days after the completion of the 6-weeks training program
Self Perceived Energy Feeling
All participants will fill a short questionnaire (from 1 to 5 points) about their perception of energy before every training. Energy Feeling will be assessed (Evergy level, Fatigue Level, Feeling of Alertness, and Feeling of Focus for the task, valued from 1 = low energy to 5 = high energy).
Time frame: [Time Frame: Changes from 3 days previous to, and 3 days after the completion of the 6-weeks training program]
White Blood Cells count
White blood cell (WBC) count including a five-part differential
Time frame: Changes from 3 days previous to, and 3 days after the completion of the 6-weeks training program
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