Changes in strength and power performance and serum hormone concentrations during 12 weeks of task-specific or strength training in conscripts
Ojanen, Tommi; Kyröläinen, Heikki; Kozharskaya, Elena; Häkkinen, Keijo (2020)
2020
Tiivistelmä
The purpose of this study was to investigate the effects of two different training
programs on strength and power performance and serum hormone concentrations. A
total of 104 male soldiers volunteered and took part in the 12-week training period
with baseline, mid-, and post-measurements of body composition, muscle strength,
lower and upper body power, and blood samples to determine serum hormone con centrations. The mean (±SD) age of subjects was 20 ± 1 years, height 180 ± 6 cm
and body mass 72.4 ± 8.8 kg. The subjects were divided into three different training
groups: soldier task-specific training (TS), strength training (ST), and control (CON).
Each group had a total of 18 training sessions during the 12-week study. In the mus cle strength tests, most improvements could be observed in the TS and ST groups,
especially, during the first weeks of the training period. Maximal isometric leg exten sion force increased significantly by 7.9 ± 12.2% (p < .05) in the TS and 7.1 ± 12.6%
(p < .05) in the ST groups between the PRE and MID, as well as between the PRE
and POST measurements by 8.1 ± 12.4% (p < .05) in TS and 12.3 ± 15.3% (p < .01)
in ST. Serum TES concentration increased significantly in TS between the PRE and
MID (16.8 ± 33.9%) and PRE and POST (11.2 ± 16.7%) measurements. Serum COR
concentrations decreased in TS between the MID and POST (−7.8 ± 10.9%) and PRE
and POST (−11.0 ± 14.3%) measurements. Although the differences observed were
rather minor in magnitude, training in the TS and ST groups led to greater improve ments in muscle strength and power performance compared to the training in the
CON group. The development of strength and/or power of the lower and upper body
was greater in the TS and ST groups, which is crucial for warfighter's performance.
Therefore, it is important to have a structured resistance-training program during
military training to optimize the strength, power, and military-specific performance.
KEYWORDS
hormonal, Physical training, power, soldiers, strength
programs on strength and power performance and serum hormone concentrations. A
total of 104 male soldiers volunteered and took part in the 12-week training period
with baseline, mid-, and post-measurements of body composition, muscle strength,
lower and upper body power, and blood samples to determine serum hormone con centrations. The mean (±SD) age of subjects was 20 ± 1 years, height 180 ± 6 cm
and body mass 72.4 ± 8.8 kg. The subjects were divided into three different training
groups: soldier task-specific training (TS), strength training (ST), and control (CON).
Each group had a total of 18 training sessions during the 12-week study. In the mus cle strength tests, most improvements could be observed in the TS and ST groups,
especially, during the first weeks of the training period. Maximal isometric leg exten sion force increased significantly by 7.9 ± 12.2% (p < .05) in the TS and 7.1 ± 12.6%
(p < .05) in the ST groups between the PRE and MID, as well as between the PRE
and POST measurements by 8.1 ± 12.4% (p < .05) in TS and 12.3 ± 15.3% (p < .01)
in ST. Serum TES concentration increased significantly in TS between the PRE and
MID (16.8 ± 33.9%) and PRE and POST (11.2 ± 16.7%) measurements. Serum COR
concentrations decreased in TS between the MID and POST (−7.8 ± 10.9%) and PRE
and POST (−11.0 ± 14.3%) measurements. Although the differences observed were
rather minor in magnitude, training in the TS and ST groups led to greater improve ments in muscle strength and power performance compared to the training in the
CON group. The development of strength and/or power of the lower and upper body
was greater in the TS and ST groups, which is crucial for warfighter's performance.
Therefore, it is important to have a structured resistance-training program during
military training to optimize the strength, power, and military-specific performance.
KEYWORDS
hormonal, Physical training, power, soldiers, strength
Kokoelmat
- Artikkelit [117]