The aims of the present investigation are: a) to determine the effects of a 16-weeks high-speed resistance training program on health parameters in independent older adults; and b) to verify the durability of the effects after 6 and 12 months after the intervention.
The present investigation will last a total of 18 months. More specifically, Two weeks for initial assessments, then the 16-weeks training program. After that, there will be a 1-year follow-up. Regarding the training program, it consists in a high-speed resistance training program of 16-weeks, with three sessions per week (Mondays, Wednesdays, and Fridays) of 50-60min, each session being comprised of five-six exercises, two-three sets, and six-ten reps/exercise. The following exercises are used during the intervention period in pneumatic machines: incline bench press, squat in multipower or with dumbbell, leg extension, seated low row, leg press, calf raise, chest fly and lat pull down. The intensity is gradually increased after each session in accordance with the movement velocity (\>1.3 to 0.75 m/s) representing approximately 20% to 60% of one repetition maximum. Participants execute the exercises rapidly and explosively making all repetitions for each shortening phase (concentric phase) performed as quickly as possible with the lengthening phase of the muscle (eccentric phase) being controlled for 2-3 s. The velocity of the concentric phase in each exercise is monitored through a BEAST™ sensor (Beast Technologies, Brescia, Italy). Participants unavailable to participate in the intervention period will be allocated to the control group. These participants continue their usual activity without engaging in any resistance training or beginning a new exercise program during the study.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
89
The High-Speed Resistance Training program has 16 weeks, with three sessions per week with 50-60min, each session being comprised of five-six exercises, two-three sets, and six-ten reps/exercise. The intensity is gradually increased after each session in accordance with the movement velocity (\>1.3 to 0.75 m/s) representing approximately 20% to 60% of one repetition maximum. Participants execute the exercises rapidly and explosively making all repetitions for each shortening phase (concentric phase) performed as quickly as possible with the lengthening phase of the muscle (eccentric phase) being controlled for 2-3 s. The velocity of the concentric phase in each exercise is monitored through a BEAST™ sensor (Beast Technologies, Brescia, Italy).
Department of Sport and Health, School of Health and Human Development, University of Évora
Evora, Portugal
Phase angle from bioelectrical impedance
Changes related to cellular health assessed by In Body S10 after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Gait Variability
Changes related to gait variability by Phypox after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Body Composition - Muscle mass; Fat Mass; Body Water.
Changes related to muscle mass, fat mass and body water assessed by In Body S10 and DXA after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Bone Densitometry - Whole-body BMC and BMD and dominant femoral neck BMC and BMD.
Changes related to bone quality assessed by DXA after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Heart Rate Variability
Changes related to autonomous nervous system assessed by Kubios HRV after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Physical Function
Changes related to physical function assessed by four functional fitness tests, namely 30s chair-stand; timed-up \& go test; ball throw and 6 min walk test after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
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Muscle strength
Changes related to Muscle strength assessed by handgrip test (both sides) and isokinetic dynamometer evaluation (both sides) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Postural control
Changes related to postural control assessed in two conditions (with one foot on the ground and both feet on the ground) by an force platform Add-on (Plux) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Falls Efficacy Scale - International (FES-I)
Changes related to the level of concern about falling during social and physical activities inside and outside the home through a scale (FES-I) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
International Physical Activity Questionnaire (IPAQ)
Changes related to the levels of physical activity through a scale (IPAQ) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
Mini-Mental State Examination
Changes related to the cognitive impairment (problems with thinking, communication, understanding and memory) through a scale (MMSE) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months
The 36-Item Short Form Survey (SF-36)
Changes related to the health status through a scale (SF-36) after a 16-weeks high-speed resistance training program and after 6 and 12 moths of the intervention period.
Time frame: 18 months