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Your search keyword '"Adams, K."' showing total 24 results
Start Over Author "Adams, K." Journal journal of science and medicine in sport
24 results on '"Adams, K."'

23. A comparison of periodised and fixed repetition training protocol on strength in older adults.

Author

DeBeliso M, Harris C, Spitzer-Gibson T, and Adams KJ

Subjects
Aged, Aged, 80 and over, Analysis of Variance, Female, Humans, Male, Middle Aged, Physical Endurance, Time Factors, Treatment Outcome, Muscle, Skeletal physiology, Physical Education and Training methods
Abstract

It has been forwarded that strength training is the primary intervention for improving and maintaining functional independence of the elderly. The purpose of this study was to determine if a periodised strength-training program was superior to a fixed repetition protocol for enhancing strength in older adults. Previously untrained male and female participants (71.6+/-5.3 y) were separated into three groups: fixed repetition (FR: n= 18), periodised (PER: n= 21) and control (C: n= 21). FR and PER protocols trained 2 days/week performing knee extensions, leg press, leg curl, biceps curl, triceps extension, lat pull downs, shoulder press and seated bench press. FR performed three sets of 9RM/exercise throughout the 18-week study. PER performed two sets of 15RM/exercise (weeks 1-6), three sets of 9RM/exercise (weeks 7-12) and four sets of 6RM/exercise (weeks 13-18). Pre-post 1RM were collected for each exercise. The sum of 1RM for the eight exercises was considered indicative of total body strength and served as the dependent variable. An ANOVA with Bonferroni post hoc was utilised to analyse the data. FR (p< 0.01) and PER (p< 0.01) groups experienced significant strength gains compared to C but were not different from each other. The results suggest that previously untrained older adults could expect similar strength gains from FR or PER strength-training protocols of 18 weeks or less.

Published
2005
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24. The effects of anabolic-androgenic steroids upon resting and peak exercise left ventricular heart wall motion kinetics in male strength and power athletes.

Author

Climstein M, O'Shea P, Adams KJ, and DeBeliso M

Subjects
Adult, Body Weight drug effects, Humans, Kinetics, Male, Myocardial Contraction drug effects, Sports physiology, Anabolic Agents pharmacology, Androgens pharmacology, Exercise physiology, Rest physiology, Steroids pharmacology, Ventricular Function, Left drug effects
Abstract

Previous investigations reported alterations in myocardial fibres and systolic function associated with anabolic-androgenic steroid consumption by athletes. Advances in bio-medical technology have allowed further investigation in assessing the possible effects of anabolic-androgenic steroids on gross left ventricular kinetics. Twenty-three male strength and power athletes with a past and current history of anabolic-androgenic steroid consumption (x 46 days, range 28 days to 70 days), were compared to 23 controls. Testing consisted of resting and immediate post-exercise transthoracic left ventricular wall cardiokymograms. Statistical results identified no difference over time between groups or condition. Cardiokymographic waveform analysis found 32.61% of all (n =184) waveforms to be abnormal (Type II, n = 56 or Type III, n = 4). There were 14 treatment subjects (60.87%) who demonstrated an abnormal waveform as compared to 9 controls (39.13%). A significant difference (p < or = 0.01) in the overall proportions of waveform types was identified where the treatment group exhibited 41.30% abnormal waveforms, compared to 23.91% by controls. Additionally, two athletes (1 treatment, 1 control) demonstrated abnormal left ventricular wall motions (Type III) analogous to impaired left ventricular performance. The results indicated: (a) highly strength trained athletes with no history of anabolic-androgenic steroid usage exhibited an unexpected high incidence of Type II waveforms (28.26% pre/23.91% post); (b) a comparable group of strength trained athletes using anabolic-androgenic steroids exhibited a significantly higher percentage of abnormal waveforms as compared to controls (34.78% pre/37.21% post). Based on these results, high intensity strength training with and without anabolic-androgenic steroid supplementation induced alterations in the left ventricular wall motion.

Published
2003
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