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The scapula's role for optimizing recruitment of the pectoralis major during the supine dumbbell chest press
Title
The scapula's role for optimizing recruitment of the pectoralis major during the supine dumbbell chest press.
Creator
Roberts, Jim., Florida Atlantic University, O'Kroy, Joseph A.
Abstract/Description
The purpose of this investigation was to quantify the electrical activity in the pectoralis major during a supine dumbbell chest press while maintaining a fixed and non-fixed scapula. Fifteen neophyte male subjects between the ages of 18--45 participated in the investigation. Each subject performed five repetitions with 85% of their estimated 1RM in both a fixed (FI) and non-fixed (FL) scapulae position. Measurement of EMG activity was recorded from the shoulder girdle and localized...
Show moreThe purpose of this investigation was to quantify the electrical activity in the pectoralis major during a supine dumbbell chest press while maintaining a fixed and non-fixed scapula. Fifteen neophyte male subjects between the ages of 18--45 participated in the investigation. Each subject performed five repetitions with 85% of their estimated 1RM in both a fixed (FI) and non-fixed (FL) scapulae position. Measurement of EMG activity was recorded from the shoulder girdle and localized musculature via pre-amplified bipolar skin surface electrodes for the duration of both testing bouts. Data analysis employed a repeated measures ANOVA (p < 0.05). No significant difference in measured electrical activity was noted for the pectoralis major between the two tested positions of the scapulae. Therefore, it appeared scapular positioning did not influence measured electrical activity in the pectoralis major.
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Date Issued
2001
PURL
http://purl.flvc.org/fcla/dt/12871
Subject Headings
Weight training--Physiological aspects, Electromyography, Scapula
Format
Document (PDF)
The Effects of Eccentric Phase Duration on Concentric Outcomes in the Squat and Bench Press
Title
The Effects of Eccentric Phase Duration on Concentric Outcomes in the Squat and Bench Press.
Creator
Carzoli, Joseph P., Zourdos, Michael C., Florida Atlantic University, College of Education, Department of Exercise Science and Health Promotion
Abstract/Description
The purpose of this research was to investigate the effects of eccentric phase duration on concentric outcomes at 60% and 80% of one-repetition maximum (1RM) in the squat and bench press. Sixteen resistance-trained males completed four laboratory visits as follows: Day 1- 1RM testing; Day 2- establishment of normative eccentric durations; Days 3 and 4- randomized fast (0.75 times) or slow (2 times) eccentric duration variations, which were controlled by visual and auditory metronomes....
Show moreThe purpose of this research was to investigate the effects of eccentric phase duration on concentric outcomes at 60% and 80% of one-repetition maximum (1RM) in the squat and bench press. Sixteen resistance-trained males completed four laboratory visits as follows: Day 1- 1RM testing; Day 2- establishment of normative eccentric durations; Days 3 and 4- randomized fast (0.75 times) or slow (2 times) eccentric duration variations, which were controlled by visual and auditory metronomes. Eccentric duration was significantly and inversely correlated with average concentric velocity (ACV) at 60% (r = 0.408) and 80% (r = -0.477) of 1RM squat and at 100% of 1RM bench press. At 60% of 1RM squat, both fast and slow eccentric conditions produced greater (p<0.001) peak concentric velocity (PCV) than normative duration with fast also producing greater PCV than slow (p=0.044). Therefore, fast eccentric durations may benefit concentric velocity.
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Date Issued
2018
PURL
http://purl.flvc.org/fau/fd/FA00013055
Subject Headings
Weight training--Physiological aspects., Weight lifting--Physiological aspects., Resistance Training--methods.
Format
Document (PDF)
Time-course of Muscle Damage and Performance Fatigue in the Squat, Bench Press, and Deadlift in Resistance Trained Men
Title
Time-course of Muscle Damage and Performance Fatigue in the Squat, Bench Press, and Deadlift in Resistance Trained Men.
Creator
Belcher, Daniel, Zourdos, Michael C., Florida Atlantic University, College of Education, Department of Exercise Science and Health Promotion
Abstract/Description
This research examined the time-course of muscle damage in the squat, bench press, and deadlift. Ten resistance-trained males performed four sets to failure with 80% of one-repetition maximum (1RM) for each exercise on three separate weeks. Swelling, range of motion (ROM), delayed onset muscle soreness (DOMS), lactate dehydrogenase (LDH), creatine kinase (CK), and average concentric velocity (ACV) were assessed pretraining and at five timepoints post-training: -0, 24, 48, 72, and 96 hours....
Show moreThis research examined the time-course of muscle damage in the squat, bench press, and deadlift. Ten resistance-trained males performed four sets to failure with 80% of one-repetition maximum (1RM) for each exercise on three separate weeks. Swelling, range of motion (ROM), delayed onset muscle soreness (DOMS), lactate dehydrogenase (LDH), creatine kinase (CK), and average concentric velocity (ACV) were assessed pretraining and at five timepoints post-training: -0, 24, 48, 72, and 96 hours. Swelling (p<0.01) increased immediately post-training, and DOMS (p<0.01) increased at 24 hours post-training in the bench press condition. Additionally, DOMS increased at 48 hours in both squat and deadlift conditions (p<0.01). Squat and deadlift elevated CK immediately post-training (p<0.01), but LDH only increased in the squat post-training. Immediately post in the bench press ACV was decreased (p<0.01) along with in the squat for up to 72 hours (p<0.01), however, ACV did not change following the deadlift (p>0.05).
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Date Issued
2018
PURL
http://purl.flvc.org/fau/fd/FA00013053
Subject Headings
Resistance Training., Muscle Fatigue--physiology., Weight training--Physiological aspects.
Format
Document (PDF)