TY - JOUR
T1 - Self-selected resistance training intensity in healthy women
T2 - The influence of a personal trainer
AU - Ratamess, Nicholas A.
AU - Faigenbaum, Avery D.
AU - Hoffman, Jay R.
AU - Kang, Jie
PY - 2008/1
Y1 - 2008/1
N2 - The purpose of the present investigation was to examine the influence of resistance training with a personal trainer versus unsupervised resistance training on the self-selected intensities used by women during resistance exercise. Forty-six resistancetrained women (age = 26.6 ± 6.4 years; body mass = 64.2 ± 10.9 kg) who either trained individually (n = 27; No PT) or with a personal trainer (n = 19; PT) were carefully instructed to select a weight they used in their own resistance training workouts that enabled the completion of 10 repetitions for the chest press (CP), leg press (LP), seated row (SR), and leg extension (LE) exercises. Each participant was subsequently tested for one repetition-maximum (1RM) strength on each exercise, and the self-selected intensity was calculated based on a percent of each 1RM value. For self-selected relative intensity, the PT group selected significantly greater intensities for LP (50% vs. 41%), CP (57.4% vs. 48%), and SR (56% vs. 42%) whereas a trend (p = 0.10) was observed for LE (43% vs. 38%) compared with No PT. Overall, the average self-selected intensity for all exercises was ∼51.4% in PT group and ∼42.3% in the No PT group. 1RM values for LP, LE, and SR were greater in the PT than No PT group. Ratings of perceived exertion values were significantly greater in the PT compared with the No PT group for CP, LE, and SR but not LP. These results indicate that resistance training under the supervision of a personal trainer leads to greater initial 1RM strength values, self-selection of greater workout intensities, and greater ratings of perceived exertion values during resistance exercise.
AB - The purpose of the present investigation was to examine the influence of resistance training with a personal trainer versus unsupervised resistance training on the self-selected intensities used by women during resistance exercise. Forty-six resistancetrained women (age = 26.6 ± 6.4 years; body mass = 64.2 ± 10.9 kg) who either trained individually (n = 27; No PT) or with a personal trainer (n = 19; PT) were carefully instructed to select a weight they used in their own resistance training workouts that enabled the completion of 10 repetitions for the chest press (CP), leg press (LP), seated row (SR), and leg extension (LE) exercises. Each participant was subsequently tested for one repetition-maximum (1RM) strength on each exercise, and the self-selected intensity was calculated based on a percent of each 1RM value. For self-selected relative intensity, the PT group selected significantly greater intensities for LP (50% vs. 41%), CP (57.4% vs. 48%), and SR (56% vs. 42%) whereas a trend (p = 0.10) was observed for LE (43% vs. 38%) compared with No PT. Overall, the average self-selected intensity for all exercises was ∼51.4% in PT group and ∼42.3% in the No PT group. 1RM values for LP, LE, and SR were greater in the PT than No PT group. Ratings of perceived exertion values were significantly greater in the PT compared with the No PT group for CP, LE, and SR but not LP. These results indicate that resistance training under the supervision of a personal trainer leads to greater initial 1RM strength values, self-selection of greater workout intensities, and greater ratings of perceived exertion values during resistance exercise.
KW - Fitness
KW - Muscular strength
KW - Ratings of perceived exertion
KW - Strength training
UR - http://www.scopus.com/inward/record.url?scp=41649095238&partnerID=8YFLogxK
U2 - 10.1519/JSC.0b013e31815f29cc
DO - 10.1519/JSC.0b013e31815f29cc
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C2 - 18296962
AN - SCOPUS:41649095238
SN - 1064-8011
VL - 22
SP - 103
EP - 111
JO - Journal of Strength and Conditioning Research
JF - Journal of Strength and Conditioning Research
IS - 1
ER -