Micro-dose of resistance-exercise: Effects of sub-maximal thumb exertion on leukocyte redistribution and fatigue in trained male weightlifters

Adam Michael Szlezak, Lotti Tajouri, James Keane, Siri Lauluten Szlezak, Clare Minahan

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3 Citations (Scopus)

Abstract

This study examined the effect of a micro-dose of thumb resistance-exercise on leukocyte redistribution, thumb pinch-strength and reported fatigue. The effect of training status was also studied. 30 male participants (20 weightlifting-trained; 10 untrained) were separated into 3 groups of 10 (WLEXP; UTEXP; WLPLA) & performed 4 x60 second thumb isometric resistance-exercise intervals separated by 60 second rest intervals in a single-blinded placebo-controlled study. Participants were assessed over a 60 minute post-intervention recovery period. Pinch-strength decreased in WLEXP and UTEXP groups (p<0.01), and recovered to baseline values (p=0.01) in the WLEXP group only. Fatigue increased in WLEXP and UTEXP groups and remained elevated across time (p<0.01). Circulating total leukocyte and lymphocyte counts increased in WLEXP and UTEXP groups across time. Constant elevation was seen in both measures for the UTEXP group (p<0.05) whereas the WLEXP group showed two peaks in leukocyte (baseline - 0 mins post, p<0.01; 20 - 60 mins post, p=0.02) and lymphocyte counts (base-line - 0 mins post, p<0.01; 20 - 60 mins post, p<0.01). Monocyte count increased similarly from baseline (p=0.47) in the WLEXP group (p=0.02) and UTEXP group (p<0.01) at 60 minutes post. Our results suggest that perception of fatigue does not correlate with physiological recovery from thumb resistance-exercise in resistance-trained individuals which has implications for recovery monitoring. Of particular novelty, we also showed that a micro-dose of thumb resistance-exercise is sufficiently stressful to distort leukocyte trafficking and thus homeostasis. ABSTRACT FROM AUTHOR
Original languageEnglish
Article number55
Pages (from-to)365-377
Number of pages13
JournalJournal of Physical Education and Sport
Volume15
Issue number3
DOIs
Publication statusPublished - 28 Sep 2015

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Thumb
Fatigue
Leukocytes
Pinch Strength
Lymphocyte Count
Leukocyte Count
Monocytes
Homeostasis
Placebos
Exercise

Cite this

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title = "Micro-dose of resistance-exercise: Effects of sub-maximal thumb exertion on leukocyte redistribution and fatigue in trained male weightlifters",
abstract = "This study examined the effect of a micro-dose of thumb resistance-exercise on leukocyte redistribution, thumb pinch-strength and reported fatigue. The effect of training status was also studied. 30 male participants (20 weightlifting-trained; 10 untrained) were separated into 3 groups of 10 (WLEXP; UTEXP; WLPLA) & performed 4 x60 second thumb isometric resistance-exercise intervals separated by 60 second rest intervals in a single-blinded placebo-controlled study. Participants were assessed over a 60 minute post-intervention recovery period. Pinch-strength decreased in WLEXP and UTEXP groups (p<0.01), and recovered to baseline values (p=0.01) in the WLEXP group only. Fatigue increased in WLEXP and UTEXP groups and remained elevated across time (p<0.01). Circulating total leukocyte and lymphocyte counts increased in WLEXP and UTEXP groups across time. Constant elevation was seen in both measures for the UTEXP group (p<0.05) whereas the WLEXP group showed two peaks in leukocyte (baseline - 0 mins post, p<0.01; 20 - 60 mins post, p=0.02) and lymphocyte counts (base-line - 0 mins post, p<0.01; 20 - 60 mins post, p<0.01). Monocyte count increased similarly from baseline (p=0.47) in the WLEXP group (p=0.02) and UTEXP group (p<0.01) at 60 minutes post. Our results suggest that perception of fatigue does not correlate with physiological recovery from thumb resistance-exercise in resistance-trained individuals which has implications for recovery monitoring. Of particular novelty, we also showed that a micro-dose of thumb resistance-exercise is sufficiently stressful to distort leukocyte trafficking and thus homeostasis. ABSTRACT FROM AUTHOR",
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Micro-dose of resistance-exercise : Effects of sub-maximal thumb exertion on leukocyte redistribution and fatigue in trained male weightlifters. / Szlezak, Adam Michael; Tajouri, Lotti; Keane, James; Szlezak, Siri Lauluten; Minahan, Clare.

In: Journal of Physical Education and Sport, Vol. 15, No. 3, 55, 28.09.2015, p. 365-377.

Research output: Contribution to journalArticleResearchpeer-review

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T2 - Effects of sub-maximal thumb exertion on leukocyte redistribution and fatigue in trained male weightlifters

AU - Szlezak, Adam Michael

AU - Tajouri, Lotti

AU - Keane, James

AU - Szlezak, Siri Lauluten

AU - Minahan, Clare

PY - 2015/9/28

Y1 - 2015/9/28

N2 - This study examined the effect of a micro-dose of thumb resistance-exercise on leukocyte redistribution, thumb pinch-strength and reported fatigue. The effect of training status was also studied. 30 male participants (20 weightlifting-trained; 10 untrained) were separated into 3 groups of 10 (WLEXP; UTEXP; WLPLA) & performed 4 x60 second thumb isometric resistance-exercise intervals separated by 60 second rest intervals in a single-blinded placebo-controlled study. Participants were assessed over a 60 minute post-intervention recovery period. Pinch-strength decreased in WLEXP and UTEXP groups (p<0.01), and recovered to baseline values (p=0.01) in the WLEXP group only. Fatigue increased in WLEXP and UTEXP groups and remained elevated across time (p<0.01). Circulating total leukocyte and lymphocyte counts increased in WLEXP and UTEXP groups across time. Constant elevation was seen in both measures for the UTEXP group (p<0.05) whereas the WLEXP group showed two peaks in leukocyte (baseline - 0 mins post, p<0.01; 20 - 60 mins post, p=0.02) and lymphocyte counts (base-line - 0 mins post, p<0.01; 20 - 60 mins post, p<0.01). Monocyte count increased similarly from baseline (p=0.47) in the WLEXP group (p=0.02) and UTEXP group (p<0.01) at 60 minutes post. Our results suggest that perception of fatigue does not correlate with physiological recovery from thumb resistance-exercise in resistance-trained individuals which has implications for recovery monitoring. Of particular novelty, we also showed that a micro-dose of thumb resistance-exercise is sufficiently stressful to distort leukocyte trafficking and thus homeostasis. ABSTRACT FROM AUTHOR

AB - This study examined the effect of a micro-dose of thumb resistance-exercise on leukocyte redistribution, thumb pinch-strength and reported fatigue. The effect of training status was also studied. 30 male participants (20 weightlifting-trained; 10 untrained) were separated into 3 groups of 10 (WLEXP; UTEXP; WLPLA) & performed 4 x60 second thumb isometric resistance-exercise intervals separated by 60 second rest intervals in a single-blinded placebo-controlled study. Participants were assessed over a 60 minute post-intervention recovery period. Pinch-strength decreased in WLEXP and UTEXP groups (p<0.01), and recovered to baseline values (p=0.01) in the WLEXP group only. Fatigue increased in WLEXP and UTEXP groups and remained elevated across time (p<0.01). Circulating total leukocyte and lymphocyte counts increased in WLEXP and UTEXP groups across time. Constant elevation was seen in both measures for the UTEXP group (p<0.05) whereas the WLEXP group showed two peaks in leukocyte (baseline - 0 mins post, p<0.01; 20 - 60 mins post, p=0.02) and lymphocyte counts (base-line - 0 mins post, p<0.01; 20 - 60 mins post, p<0.01). Monocyte count increased similarly from baseline (p=0.47) in the WLEXP group (p=0.02) and UTEXP group (p<0.01) at 60 minutes post. Our results suggest that perception of fatigue does not correlate with physiological recovery from thumb resistance-exercise in resistance-trained individuals which has implications for recovery monitoring. Of particular novelty, we also showed that a micro-dose of thumb resistance-exercise is sufficiently stressful to distort leukocyte trafficking and thus homeostasis. ABSTRACT FROM AUTHOR

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