Neuromuscular Adaptation to Resistance Training Involving Compound Exercises is Different between Caucasians and South Asians

Allan Knox, Nicholas Sculthorpe, Fergal Grace

Research output: Contribution to journalMeeting Abstract

Abstract

Improvements in muscular strength (MS) during the initial stages of resistance training (RT) are attributed to adaptive alterations in nervous system function independent of muscular hypertrophy. Differential responses to short term RT have been identified between several racial groups however; differences in neuromuscular adaptation between Caucasian (CAUC) and South Asian (SOU) males are unknown. PURPOSE: To examine MS responses to 6 weeks RT in CAUC and SOU individuals. METHODS: Fifteen CAUC (25 ± 4 yrs) and thirteen SOU (25 ± 7 yrs) apparently healthy males participated in a whole body progressive RT protocol 3 x week-1 for 6 weeks. Training consisted of five core exercises: squats, military press, lateral pull downs, bench press and deadlifts split into 2 sessions (S-A, S-B) which were completed consecutively. Squats were performed in every exercise session. Upper body (UB) and lower body (LB) MS pre and post of RT was measured by 3-repetition maximum (3RM) of bench press and squat. Progression of RT was recorded in both groups Differences between groups, time points and their interaction were established by mixed methods repeated measures ANOVA. Statistical significance was set at p<0.05. All data are presented as mean difference (Δ) ± SD. RESULTS: Baseline UB and LB 3RM were similar between groups (UB p=0.72; LB p=0.45). Following RT, UB and LB 3RM significantly increased (p<0.001) in the CAUC group (UB: Δ 13.7 ± 1.6 Kg; LB: Δ 61.3 ± 3.8 Kg) and SOU group (UB: Δ 11.9 ± 1.8 Kg; LB: Δ 42.7 ± 4.0 Kg). CAUC LB 3RM improved greater than SOU following RT (p=0.002). The accumulated load lifted in S-A and S-B improved (p<0.001) in both groups with a time interaction between groups identified (S-A: CAUC Δ 112.9 ± 2.6 Kg; SOU Δ 106 ± 3.8 Kg, p=0.02; S-B: CAUC Δ 138 ± 6.1 Kg; SOU Δ 110.8 ± 6.5 Kg, p=0.03). Significant increases in progression were observed in all core exercises in both groups (all p<0.001). A time interaction between groups was identified in week 2 of squat progression (p=0.03) which strengthened as RT progressed. When squat exercises were excluded from analysis, no interactions in S-A or S-B between groups were observed (p>0.05 for both sessions). CONCLUSION: Although SOU respond similarly to CAUC to RT, the rate of progression to large coordinated movement differs between groups which highlight potential differences in neuromuscular adaptation.
Original languageEnglish
Pages (from-to)541
JournalMedicine & Science in Sports & Exercise
Volume47
Issue number5S
DOIs
Publication statusPublished - Jun 2015

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Resistance Training
Exercise
Hypertrophy
Nervous System
Analysis of Variance

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@article{eb83ce396b644405bf1cba0938d2786a,
title = "Neuromuscular Adaptation to Resistance Training Involving Compound Exercises is Different between Caucasians and South Asians",
abstract = "Improvements in muscular strength (MS) during the initial stages of resistance training (RT) are attributed to adaptive alterations in nervous system function independent of muscular hypertrophy. Differential responses to short term RT have been identified between several racial groups however; differences in neuromuscular adaptation between Caucasian (CAUC) and South Asian (SOU) males are unknown. PURPOSE: To examine MS responses to 6 weeks RT in CAUC and SOU individuals. METHODS: Fifteen CAUC (25 ± 4 yrs) and thirteen SOU (25 ± 7 yrs) apparently healthy males participated in a whole body progressive RT protocol 3 x week-1 for 6 weeks. Training consisted of five core exercises: squats, military press, lateral pull downs, bench press and deadlifts split into 2 sessions (S-A, S-B) which were completed consecutively. Squats were performed in every exercise session. Upper body (UB) and lower body (LB) MS pre and post of RT was measured by 3-repetition maximum (3RM) of bench press and squat. Progression of RT was recorded in both groups Differences between groups, time points and their interaction were established by mixed methods repeated measures ANOVA. Statistical significance was set at p<0.05. All data are presented as mean difference (Δ) ± SD. RESULTS: Baseline UB and LB 3RM were similar between groups (UB p=0.72; LB p=0.45). Following RT, UB and LB 3RM significantly increased (p<0.001) in the CAUC group (UB: Δ 13.7 ± 1.6 Kg; LB: Δ 61.3 ± 3.8 Kg) and SOU group (UB: Δ 11.9 ± 1.8 Kg; LB: Δ 42.7 ± 4.0 Kg). CAUC LB 3RM improved greater than SOU following RT (p=0.002). The accumulated load lifted in S-A and S-B improved (p<0.001) in both groups with a time interaction between groups identified (S-A: CAUC Δ 112.9 ± 2.6 Kg; SOU Δ 106 ± 3.8 Kg, p=0.02; S-B: CAUC Δ 138 ± 6.1 Kg; SOU Δ 110.8 ± 6.5 Kg, p=0.03). Significant increases in progression were observed in all core exercises in both groups (all p<0.001). A time interaction between groups was identified in week 2 of squat progression (p=0.03) which strengthened as RT progressed. When squat exercises were excluded from analysis, no interactions in S-A or S-B between groups were observed (p>0.05 for both sessions). CONCLUSION: Although SOU respond similarly to CAUC to RT, the rate of progression to large coordinated movement differs between groups which highlight potential differences in neuromuscular adaptation.",
author = "Allan Knox and Nicholas Sculthorpe and Fergal Grace",
year = "2015",
month = "6",
doi = "10.1249/01.mss.0000478178.10393.b5",
language = "English",
volume = "47",
pages = "541",
journal = "Medicine & Science in Sports & Exercise",
issn = "0195-9131",
publisher = "American College of Sports Medicine",
number = "5S",

}

Neuromuscular Adaptation to Resistance Training Involving Compound Exercises is Different between Caucasians and South Asians. / Knox, Allan; Sculthorpe, Nicholas; Grace, Fergal.

In: Medicine & Science in Sports & Exercise, Vol. 47, No. 5S, 06.2015, p. 541.

Research output: Contribution to journalMeeting Abstract

TY - JOUR

T1 - Neuromuscular Adaptation to Resistance Training Involving Compound Exercises is Different between Caucasians and South Asians

AU - Knox, Allan

AU - Sculthorpe, Nicholas

AU - Grace, Fergal

PY - 2015/6

Y1 - 2015/6

N2 - Improvements in muscular strength (MS) during the initial stages of resistance training (RT) are attributed to adaptive alterations in nervous system function independent of muscular hypertrophy. Differential responses to short term RT have been identified between several racial groups however; differences in neuromuscular adaptation between Caucasian (CAUC) and South Asian (SOU) males are unknown. PURPOSE: To examine MS responses to 6 weeks RT in CAUC and SOU individuals. METHODS: Fifteen CAUC (25 ± 4 yrs) and thirteen SOU (25 ± 7 yrs) apparently healthy males participated in a whole body progressive RT protocol 3 x week-1 for 6 weeks. Training consisted of five core exercises: squats, military press, lateral pull downs, bench press and deadlifts split into 2 sessions (S-A, S-B) which were completed consecutively. Squats were performed in every exercise session. Upper body (UB) and lower body (LB) MS pre and post of RT was measured by 3-repetition maximum (3RM) of bench press and squat. Progression of RT was recorded in both groups Differences between groups, time points and their interaction were established by mixed methods repeated measures ANOVA. Statistical significance was set at p<0.05. All data are presented as mean difference (Δ) ± SD. RESULTS: Baseline UB and LB 3RM were similar between groups (UB p=0.72; LB p=0.45). Following RT, UB and LB 3RM significantly increased (p<0.001) in the CAUC group (UB: Δ 13.7 ± 1.6 Kg; LB: Δ 61.3 ± 3.8 Kg) and SOU group (UB: Δ 11.9 ± 1.8 Kg; LB: Δ 42.7 ± 4.0 Kg). CAUC LB 3RM improved greater than SOU following RT (p=0.002). The accumulated load lifted in S-A and S-B improved (p<0.001) in both groups with a time interaction between groups identified (S-A: CAUC Δ 112.9 ± 2.6 Kg; SOU Δ 106 ± 3.8 Kg, p=0.02; S-B: CAUC Δ 138 ± 6.1 Kg; SOU Δ 110.8 ± 6.5 Kg, p=0.03). Significant increases in progression were observed in all core exercises in both groups (all p<0.001). A time interaction between groups was identified in week 2 of squat progression (p=0.03) which strengthened as RT progressed. When squat exercises were excluded from analysis, no interactions in S-A or S-B between groups were observed (p>0.05 for both sessions). CONCLUSION: Although SOU respond similarly to CAUC to RT, the rate of progression to large coordinated movement differs between groups which highlight potential differences in neuromuscular adaptation.

AB - Improvements in muscular strength (MS) during the initial stages of resistance training (RT) are attributed to adaptive alterations in nervous system function independent of muscular hypertrophy. Differential responses to short term RT have been identified between several racial groups however; differences in neuromuscular adaptation between Caucasian (CAUC) and South Asian (SOU) males are unknown. PURPOSE: To examine MS responses to 6 weeks RT in CAUC and SOU individuals. METHODS: Fifteen CAUC (25 ± 4 yrs) and thirteen SOU (25 ± 7 yrs) apparently healthy males participated in a whole body progressive RT protocol 3 x week-1 for 6 weeks. Training consisted of five core exercises: squats, military press, lateral pull downs, bench press and deadlifts split into 2 sessions (S-A, S-B) which were completed consecutively. Squats were performed in every exercise session. Upper body (UB) and lower body (LB) MS pre and post of RT was measured by 3-repetition maximum (3RM) of bench press and squat. Progression of RT was recorded in both groups Differences between groups, time points and their interaction were established by mixed methods repeated measures ANOVA. Statistical significance was set at p<0.05. All data are presented as mean difference (Δ) ± SD. RESULTS: Baseline UB and LB 3RM were similar between groups (UB p=0.72; LB p=0.45). Following RT, UB and LB 3RM significantly increased (p<0.001) in the CAUC group (UB: Δ 13.7 ± 1.6 Kg; LB: Δ 61.3 ± 3.8 Kg) and SOU group (UB: Δ 11.9 ± 1.8 Kg; LB: Δ 42.7 ± 4.0 Kg). CAUC LB 3RM improved greater than SOU following RT (p=0.002). The accumulated load lifted in S-A and S-B improved (p<0.001) in both groups with a time interaction between groups identified (S-A: CAUC Δ 112.9 ± 2.6 Kg; SOU Δ 106 ± 3.8 Kg, p=0.02; S-B: CAUC Δ 138 ± 6.1 Kg; SOU Δ 110.8 ± 6.5 Kg, p=0.03). Significant increases in progression were observed in all core exercises in both groups (all p<0.001). A time interaction between groups was identified in week 2 of squat progression (p=0.03) which strengthened as RT progressed. When squat exercises were excluded from analysis, no interactions in S-A or S-B between groups were observed (p>0.05 for both sessions). CONCLUSION: Although SOU respond similarly to CAUC to RT, the rate of progression to large coordinated movement differs between groups which highlight potential differences in neuromuscular adaptation.

U2 - 10.1249/01.mss.0000478178.10393.b5

DO - 10.1249/01.mss.0000478178.10393.b5

M3 - Meeting Abstract

VL - 47

SP - 541

JO - Medicine & Science in Sports & Exercise

JF - Medicine & Science in Sports & Exercise

SN - 0195-9131

IS - 5S

ER -