Satellite cell response to concurrent resistance exercise and high-intensity interval training in sedentary, overweight/obese, middle-aged individuals

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Satellite cell response to concurrent resistance exercise and high-intensity interval training in sedentary, overweight/obese, middle-aged individuals. / Pugh, Jamie K.; Faulkner, Steve H.; Turner, Mark C.; Nimmo, Myra A.

In: European Journal of Applied Physiology, Vol. 118, No. 2, 01.02.2018, p. 225-238.

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@article{c23fab85d75d4d4ebce2eeafbde6e738,
title = "Satellite cell response to concurrent resistance exercise and high-intensity interval training in sedentary, overweight/obese, middle-aged individuals",
abstract = "PURPOSE: Sarcopenia can begin from the 4-5th decade of life and is exacerbated by obesity and inactivity. A combination of resistance exercise (RE) and endurance exercise is recommended to combat rising obesity and inactivity levels. However, work continues to elucidate whether interference in adaptive outcomes occur when RE and endurance exercise are performed concurrently. This study examined whether a single bout of concurrent RE and high-intensity interval training (HIIT) alters the satellite cell response following exercise compared to RE alone.METHODS: Eight sedentary, overweight/obese, middle-aged individuals performed RE only (8 × 8 leg extensions at 70% 1RM), or RE + HIIT (10 × 1 min at 90% HRmax on a cycle ergometer). Muscle biopsies were collected from the vastus lateralis before and 96 h after the RE component to determine muscle fiber type-specific total (Pax7(+) cells) and active (MyoD(+) cells) satellite cell number using immunofluorescence microscopy.RESULTS: Type-I-specific Pax7(+) (P = 0.001) cell number increased after both exercise trials. Type-I-specific MyoD(+) (P = 0.001) cell number increased after RE only. However, an elevated baseline value in RE + HIIT compared to RE (P = 0.046) was observed, with no differences between exercise trials at 96 h (P = 0.21). Type-II-specific Pax7(+) and MyoD(+) cell number remained unchanged after both exercise trials (all P ≥ 0.13).CONCLUSION: Combining a HIIT session after a single bout of RE does not interfere with the increase in type-I-specific total, and possibly active, satellite cell number, compared to RE only. Concurrent RE + HIIT may offer a time-efficient way to maximise the physiological benefits from a single bout of exercise in sedentary, overweight/obese, middle-aged individuals.",
keywords = "Concurrent exercise, Resistance exercise, High-intensity interval training, Obesity , Acute responses , Interference, Satellite cell, mRNA expression , Human skeletal muscle ",
author = "Pugh, {Jamie K.} and Faulkner, {Steve H.} and Turner, {Mark C.} and Nimmo, {Myra A.}",
year = "2018",
month = feb,
day = "1",
doi = "10.1007/s00421-017-3721-y",
language = "English",
volume = "118",
pages = "225--238",
journal = "European Journal of Applied Physiology",
issn = "1439-6319",
publisher = "Springer Verlag",
number = "2",

}

RIS

TY - JOUR

T1 - Satellite cell response to concurrent resistance exercise and high-intensity interval training in sedentary, overweight/obese, middle-aged individuals

AU - Pugh, Jamie K.

AU - Faulkner, Steve H.

AU - Turner, Mark C.

AU - Nimmo, Myra A.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - PURPOSE: Sarcopenia can begin from the 4-5th decade of life and is exacerbated by obesity and inactivity. A combination of resistance exercise (RE) and endurance exercise is recommended to combat rising obesity and inactivity levels. However, work continues to elucidate whether interference in adaptive outcomes occur when RE and endurance exercise are performed concurrently. This study examined whether a single bout of concurrent RE and high-intensity interval training (HIIT) alters the satellite cell response following exercise compared to RE alone.METHODS: Eight sedentary, overweight/obese, middle-aged individuals performed RE only (8 × 8 leg extensions at 70% 1RM), or RE + HIIT (10 × 1 min at 90% HRmax on a cycle ergometer). Muscle biopsies were collected from the vastus lateralis before and 96 h after the RE component to determine muscle fiber type-specific total (Pax7(+) cells) and active (MyoD(+) cells) satellite cell number using immunofluorescence microscopy.RESULTS: Type-I-specific Pax7(+) (P = 0.001) cell number increased after both exercise trials. Type-I-specific MyoD(+) (P = 0.001) cell number increased after RE only. However, an elevated baseline value in RE + HIIT compared to RE (P = 0.046) was observed, with no differences between exercise trials at 96 h (P = 0.21). Type-II-specific Pax7(+) and MyoD(+) cell number remained unchanged after both exercise trials (all P ≥ 0.13).CONCLUSION: Combining a HIIT session after a single bout of RE does not interfere with the increase in type-I-specific total, and possibly active, satellite cell number, compared to RE only. Concurrent RE + HIIT may offer a time-efficient way to maximise the physiological benefits from a single bout of exercise in sedentary, overweight/obese, middle-aged individuals.

AB - PURPOSE: Sarcopenia can begin from the 4-5th decade of life and is exacerbated by obesity and inactivity. A combination of resistance exercise (RE) and endurance exercise is recommended to combat rising obesity and inactivity levels. However, work continues to elucidate whether interference in adaptive outcomes occur when RE and endurance exercise are performed concurrently. This study examined whether a single bout of concurrent RE and high-intensity interval training (HIIT) alters the satellite cell response following exercise compared to RE alone.METHODS: Eight sedentary, overweight/obese, middle-aged individuals performed RE only (8 × 8 leg extensions at 70% 1RM), or RE + HIIT (10 × 1 min at 90% HRmax on a cycle ergometer). Muscle biopsies were collected from the vastus lateralis before and 96 h after the RE component to determine muscle fiber type-specific total (Pax7(+) cells) and active (MyoD(+) cells) satellite cell number using immunofluorescence microscopy.RESULTS: Type-I-specific Pax7(+) (P = 0.001) cell number increased after both exercise trials. Type-I-specific MyoD(+) (P = 0.001) cell number increased after RE only. However, an elevated baseline value in RE + HIIT compared to RE (P = 0.046) was observed, with no differences between exercise trials at 96 h (P = 0.21). Type-II-specific Pax7(+) and MyoD(+) cell number remained unchanged after both exercise trials (all P ≥ 0.13).CONCLUSION: Combining a HIIT session after a single bout of RE does not interfere with the increase in type-I-specific total, and possibly active, satellite cell number, compared to RE only. Concurrent RE + HIIT may offer a time-efficient way to maximise the physiological benefits from a single bout of exercise in sedentary, overweight/obese, middle-aged individuals.

KW - Concurrent exercise

KW - Resistance exercise

KW - High-intensity interval training

KW - Obesity

KW - Acute responses

KW - Interference

KW - Satellite cell

KW - mRNA expression

KW - Human skeletal muscle

U2 - 10.1007/s00421-017-3721-y

DO - 10.1007/s00421-017-3721-y

M3 - Article

C2 - 29071380

VL - 118

SP - 225

EP - 238

JO - European Journal of Applied Physiology

JF - European Journal of Applied Physiology

SN - 1439-6319

IS - 2

ER -