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  1. #1
    Registered User snorkelman's Avatar
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    Increase in body temp led to increased power and jump height

    So claims Muscle & Fitness November 2009 on page 21. They cite the Annual Meeting of the National Strength & Conditioning Association (2009). I found the electronic outlines for all the presentations but I have no idea which one to look at for this research. A quick search on pub med turned up one promising study but the details didn't match what M&F claimed.

    Any insight as to the study referenced in M&F. I am particularly interested in checking to see if the study matched protein intake between the groups.
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  2. #2
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    did you search around on the NSCA website:
    http://www.nsca-lift.org/publication...ls/default.asp
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  3. #3
    nevigsawkufelgnisaton in10city's Avatar
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    Originally Posted by snorkelman View Post
    So claims Muscle & Fitness November 2009 on page 21. They cite the Annual Meeting of the National Strength & Conditioning Association (2009). I found the electronic outlines for all the presentations but I have no idea which one to look at for this research. A quick search on pub med turned up one promising study but the details didn't match what M&F claimed.

    Any insight as to the study referenced in M&F. I am particularly interested in checking to see if the study matched protein intake between the groups.
    I assume this is what you found already? A lot of these types of mini-studies for these presentations don't bother with any dietary data other than instructing not change. If this ever gets published, there might be more info.

    http://www.nsca-lift.org/abstracts/Abstracts.pdf

    Originally Posted by Page 48
    The Effect Of An Extended Warm-Up On Diurnal Performance Differences In Loaded Counter-Movement Jumps

    Kristie-Lee Taylor, Michael Barker, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard

    PURPOSE: We have previously shown that the performance of a loaded counter-movement jump, which is frequently used in the assessment of an athlete’s neuromuscular capabilities, is affected by the time of day that the assessment is conducted. This study aimed to extend those findings by examining whether such variations in performance can be accounted for by the diurnal fluctuations known to exist in body temperature.

    METHODS: Eight recreationally trained males (29.8 ? 5.2 yrs; 178.3 ? 5.2 cm; 80.3 ? 6.5 kg) with a minimum of 6 months resistance training history completed four separate sessions (differing in time of day and type of warm-up completed). In a randomised order, jump performance was assessed following (a) control warm-up at 8am (b) control warm-up at 4pm (c) extended warm-up at 8am and (d) extended warm-up at 4pm. The control warm-up consisted of dynamic exercises and practice jumps equivalent to the standard warm-up for strength and power assessment used in our laboratory. The extended warm-up incorporated a 20min general warm-up period on a stationary bike (150 – 200 W), prior to completion of the control warm-up. Body temperature was measured using a combination of skin and core temperature to estimate overall body temperature. Peak power, mean power, peak velocity, peak force and jump height were measured using a linear position transducer attached to an Olympic lifting bar with an additional load of 20kg (i.e. total load of 40kg). Subjects performed 2 sets of 3 repetitions of maximal effort countermovement jumps with the bar across their shoulders.

    RESULTS: Prior to jump testing for the AM and PM control conditions, whole body temperature was 36.5 and 36.8?C respectively, which increased to 36.8 and 36.9?C during AM and PM extended warm-up conditions. All kinetic and kinematic variables were higher (ES range = 0.2 – 0.3) during the PM as compared to the AM control condition (Table 1). Following the extended AM warm-up, when body temperature was ~ equivalent to the PM control condition, performance was comparable (ES <0.1), except for peak power where the AM extended condition produced greater results (ES = 0.3).

    CONCLUSIONS: The results of this study indicate that the diurnal variation in whole body temperature, which peaks in the early evening, may explain the diurnal performance differences existent in explosive power output and associated variables. The performance of an extended warmup, designed to increase the whole body temperature, resulted in an improvement in the kinetic and kinematic variables commonly reported from jump performance in the AM condition.

    PRACTICAL APPLICATIONS: It is suggested that warm-up protocols designed to increase body temperature may be beneficial for reducing diurnal differences in jump performance. This is important for ensuring maximal performance results, and for monitoring performance changes over time, when it may be impractical to standardise the time of day that testing takes place.
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  4. #4
    I AM John Galt Ibballard's Avatar
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    Can't say that I am seeing much novelty in this particular claim. Most of the precepts involved make sense from a basic biological standpoint. I'm not sure it's a function of "core" body temperature though as it is a synergistic relationship between muscle fiber relaxation at warmer temperatures, and the increase in metabolic rate that typically goes hand in hand with body temperature rising. The body temperature rising is just the release of the excess energy, with increased energy being put towards other physical processes... such as exercise.

    It is nice to have a study summing this up, but I don't know that it is going to introduce many new concepts.
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  5. #5
    Registered User Aefi's Avatar
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    Originally Posted by Ibballard View Post
    Can't say that I am seeing much novelty in this particular claim. Most of the precepts involved make sense from a basic biological standpoint. I'm not sure it's a function of "core" body temperature though as it is a synergistic relationship between muscle fiber relaxation at warmer temperatures, and the increase in metabolic rate that typically goes hand in hand with body temperature rising. The body temperature rising is just the release of the excess energy, with increased energy being put towards other physical processes... such as exercise.

    It is nice to have a study summing this up, but I don't know that it is going to introduce many new concepts.

    I agree with this.

    From a common sense standpoint, we know performance increases after a warmup, vs trying to do a maximal effort cold.

    If I'm reading this correctly, they're essentially concluding that an extended warmup increases AM performance. That's fine. Groundbreaking? Hardly.
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  6. #6
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    Originally Posted by Aefi View Post
    I agree with this.

    From a common sense standpoint, we know performance increases after a warmup, vs trying to do a maximal effort cold.

    If I'm reading this correctly, they're essentially concluding that an extended warmup increases AM performance. That's fine. Groundbreaking? Hardly.
    indeed. but it's not really the result they were looking for: it's kinda messed up

    extended AM warm up = PM control - no warm up for body temp, BUT you get better results with power than the PM conditions with warm ups? gotta find this whole paper to see what the full comparisons are in peak power among all conditions.

    intriguingly it would be neat to see where this finding fits in against fatigue work that seeks (with the vacuum glove) to cool one down in order to grind out more reps or keep from freezing to death. do you know the thing i mean? darpa funded research for the military that's now crossed over to sport training? i'll try to find a ref...

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  7. #7
    Registered User labradarep's Avatar
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    Nervous System works more efficiently when the body is warmed up.

    No Great Mystery here.

    M & F just needs things to publish.

    Everyday Joe would probably find this research "groundbreaking"
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