Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers

Geoffrey M. Minett

    Research output: ThesisDoctoral Thesis

    105 Downloads (Pure)

    Abstract

    This thesis examined the effects of practical mixed-method cooling interventions for protection and recovery of medium-fast bowling performance in the heat, particularly focusing on the dosage effects required to elicit an ergogenic response. The initial investigation examined the effects of pre-cooling volume on neuromuscular function and performance during self-paced intermittent-sprint exercise in the heat. Ten male, team-sport athletes completed four randomised trials involving an 85 min cricket-specific self-paced intermittent-sprint exercise protocol in 33°C and 33% relative humidity. Pre-cooling interventions were applied for 20 min pre-exercise and included a control (no cooling; CONT), head (H), head+hand (HH), and whole-body methods (WB). Measures of maximal voluntary contraction (MVC) force and voluntary activation (VA) were obtained pre- and post-intervention and mid- and post-exercise. Self-paced intermittent-sprint running performance, core temperature (Tc), skin temperature (Tsk), heart rate (HR), rating of perceived exertion (RPE) and a thermal sensation scale (TSS) were monitored throughout. Further, venous and capillary blood samples were analysed for metabolite, muscle damage and inflammatory markers. The results demonstrated WB pre-cooling increased hard running distances by 12% compared to CONT (P < 0.05), and 6 â“ 7% compared to HH (P= 0.02) and H (P= 0.001), respectively. Similarly, WB pre-cooling blunted HR, Tc, Tsk, RPE and TSS responses during exercise to the greatest extent. Collectively, these data may highlight a link between pre-cooling volume and subsequent exercise performance, as larger surface area coverage augmented subsequent free-paced exercise capacity, in conjunction with greater suppression of physiological load.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • Charles Sturt University
    Supervisors/Advisors
    • Duffield, Rob, Principal Supervisor
    • Marino, Frank, Co-Supervisor
    • Portus, Marc, Co-Supervisor, External person
    Award date01 May 2013
    Place of PublicationAustralia
    Publisher
    Publication statusPublished - 2013

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    Hot Temperature
    Exercise
    Skin Temperature
    Head
    Running
    Hand
    Heart Rate
    Gryllidae
    Humidity
    Athletes
    Sports
    Muscles
    Temperature

    Cite this

    Minett, Geoffrey M.. / Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers. Australia : Charles Sturt University, 2013. 343 p.
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    title = "Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers",
    abstract = "This thesis examined the effects of practical mixed-method cooling interventions for protection and recovery of medium-fast bowling performance in the heat, particularly focusing on the dosage effects required to elicit an ergogenic response. The initial investigation examined the effects of pre-cooling volume on neuromuscular function and performance during self-paced intermittent-sprint exercise in the heat. Ten male, team-sport athletes completed four randomised trials involving an 85 min cricket-specific self-paced intermittent-sprint exercise protocol in 33°C and 33{\%} relative humidity. Pre-cooling interventions were applied for 20 min pre-exercise and included a control (no cooling; CONT), head (H), head+hand (HH), and whole-body methods (WB). Measures of maximal voluntary contraction (MVC) force and voluntary activation (VA) were obtained pre- and post-intervention and mid- and post-exercise. Self-paced intermittent-sprint running performance, core temperature (Tc), skin temperature (Tsk), heart rate (HR), rating of perceived exertion (RPE) and a thermal sensation scale (TSS) were monitored throughout. Further, venous and capillary blood samples were analysed for metabolite, muscle damage and inflammatory markers. The results demonstrated WB pre-cooling increased hard running distances by 12{\%} compared to CONT (P < 0.05), and 6 {\~A}¢{\^A}“ 7{\%} compared to HH (P= 0.02) and H (P= 0.001), respectively. Similarly, WB pre-cooling blunted HR, Tc, Tsk, RPE and TSS responses during exercise to the greatest extent. Collectively, these data may highlight a link between pre-cooling volume and subsequent exercise performance, as larger surface area coverage augmented subsequent free-paced exercise capacity, in conjunction with greater suppression of physiological load.",
    author = "Minett, {Geoffrey M.}",
    year = "2013",
    language = "English",
    publisher = "Charles Sturt University",
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    }

    Minett, GM 2013, 'Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers', Doctor of Philosophy, Charles Sturt University, Australia.

    Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers. / Minett, Geoffrey M.

    Australia : Charles Sturt University, 2013. 343 p.

    Research output: ThesisDoctoral Thesis

    TY - THES

    T1 - Cooling for protection and recovery from exercise- and environment-induced heat stress in medium-fast bowlers

    AU - Minett, Geoffrey M.

    PY - 2013

    Y1 - 2013

    N2 - This thesis examined the effects of practical mixed-method cooling interventions for protection and recovery of medium-fast bowling performance in the heat, particularly focusing on the dosage effects required to elicit an ergogenic response. The initial investigation examined the effects of pre-cooling volume on neuromuscular function and performance during self-paced intermittent-sprint exercise in the heat. Ten male, team-sport athletes completed four randomised trials involving an 85 min cricket-specific self-paced intermittent-sprint exercise protocol in 33°C and 33% relative humidity. Pre-cooling interventions were applied for 20 min pre-exercise and included a control (no cooling; CONT), head (H), head+hand (HH), and whole-body methods (WB). Measures of maximal voluntary contraction (MVC) force and voluntary activation (VA) were obtained pre- and post-intervention and mid- and post-exercise. Self-paced intermittent-sprint running performance, core temperature (Tc), skin temperature (Tsk), heart rate (HR), rating of perceived exertion (RPE) and a thermal sensation scale (TSS) were monitored throughout. Further, venous and capillary blood samples were analysed for metabolite, muscle damage and inflammatory markers. The results demonstrated WB pre-cooling increased hard running distances by 12% compared to CONT (P < 0.05), and 6 â“ 7% compared to HH (P= 0.02) and H (P= 0.001), respectively. Similarly, WB pre-cooling blunted HR, Tc, Tsk, RPE and TSS responses during exercise to the greatest extent. Collectively, these data may highlight a link between pre-cooling volume and subsequent exercise performance, as larger surface area coverage augmented subsequent free-paced exercise capacity, in conjunction with greater suppression of physiological load.

    AB - This thesis examined the effects of practical mixed-method cooling interventions for protection and recovery of medium-fast bowling performance in the heat, particularly focusing on the dosage effects required to elicit an ergogenic response. The initial investigation examined the effects of pre-cooling volume on neuromuscular function and performance during self-paced intermittent-sprint exercise in the heat. Ten male, team-sport athletes completed four randomised trials involving an 85 min cricket-specific self-paced intermittent-sprint exercise protocol in 33°C and 33% relative humidity. Pre-cooling interventions were applied for 20 min pre-exercise and included a control (no cooling; CONT), head (H), head+hand (HH), and whole-body methods (WB). Measures of maximal voluntary contraction (MVC) force and voluntary activation (VA) were obtained pre- and post-intervention and mid- and post-exercise. Self-paced intermittent-sprint running performance, core temperature (Tc), skin temperature (Tsk), heart rate (HR), rating of perceived exertion (RPE) and a thermal sensation scale (TSS) were monitored throughout. Further, venous and capillary blood samples were analysed for metabolite, muscle damage and inflammatory markers. The results demonstrated WB pre-cooling increased hard running distances by 12% compared to CONT (P < 0.05), and 6 â“ 7% compared to HH (P= 0.02) and H (P= 0.001), respectively. Similarly, WB pre-cooling blunted HR, Tc, Tsk, RPE and TSS responses during exercise to the greatest extent. Collectively, these data may highlight a link between pre-cooling volume and subsequent exercise performance, as larger surface area coverage augmented subsequent free-paced exercise capacity, in conjunction with greater suppression of physiological load.

    M3 - Doctoral Thesis

    PB - Charles Sturt University

    CY - Australia

    ER -