Friday, April 8, 2011

High intensity exercises reduce CVD risk factors better than aerobic activities in adolescent youth (study)

This article examines the effects of brief, intense exercise in comparison with traditional endurance exercise on both novel and traditional markers of cardiovascular disease (CVD) in youth.

Buchan, D., Ollis, S., Young, J., Thomas, N., Cooper, S., Tong, T., Nie, J., Malina, R., & Baker, J. (2011). The effects of time and intensity of exercise on novel and established markers of CVD in adolescent youth American Journal of Human Biology DOI: 10.1002/ajhb.21166

We've know for a while the importance of high-intensity exercises and how it can be used to develop fitness levels. Even though the periods (durations) may be shorter than typical aerobic activities, the benefits are usually longer lasting and the improvements to cardiovascular health are more significant.

Exergaming Points to Ponder (P2P)
Which exergames have the potential to illicit short but intense bouts of exercise?  These are some that come to mind, what have I missed?
  1. EyeToy Kinetic (PS2)
  2. Microsoft Kinect [UPDATED 4/15/2011 - Adventures - Rallyball, Reflex Ridge and Space Pop]
  3. Wii Sports Boxing
  4. Trazer 2
  5. Lightspace Wall or Floor
  6. XaviX J-Mat (10 second step test)
  7. Makoto
Objectives:
This article examines the effects of brief, intense exercise in comparison with traditional endurance exercise on both novel and traditional markers of cardiovascular disease (CVD) in youth.

Methods:
Forty seven boys and ten girls (16.4 ± 0.7 years of age) were divided into a moderate (MOD), high intensity (HIT), or a control group. The MOD group (12 boys, 4 girls) and HIT group (15 boys, 2 girls) performed three weekly exercise sessions over 7 weeks. Each session consisted of either four to six repeats of maximal sprint running within a 20 m area with 20–30 s recovery (HIT) or 20 min continuous running within a 20 m area at ∼70% maximal oxygen uptake (VO2max).

Results:
Total exercise time commitment over the intervention was 420 min (MOD) and 63 min (HIT). Training volume was 85% lower for the HIT group. Total estimated energy expenditure was ∼907.2 kcal (HIT) and ∼4410 kcal (MOD). Significant improvements (P ≤ 0.05) were found in systolic blood pressure, aerobic fitness, and body mass index (BMI) postintervention (HIT). In the MOD group, significant (P ≤ 0.05) improvements were noted in aerobic fitness, percentage body fat (%BF), BMI, fibrinogen (Fg), plasminogen activator inhibitor-1, and insulin concentrations.

Conclusions:
These findings demonstrate that brief, intense exercise is a time efficient means for improving CVD risk factors in adolescents

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2 comments:

  1. To be exact it isn't the platform (as in Microsoft Kinect), that is relavent it is the partcular game being used or even more correctly 'HOW' the game is used.

    Wii Boxing is a good example but only if the CPU or real opponent is of a suitably high level to require a HIT response.

    Certainly the best example of HIT ExerGames is Machine Dance. The songs typically go for 1.30 to 3min. When these songs are used at expert-master level they ellicit a near maximal physical response...it then takes 30sec to a min to chose then engage the following song, allowing the players to regain composure and bring heart rates back within 75% max. Fire up the next song and do 10 rounds of this program and you end up with a superb HIT combined Interval Style ExerGaming Fitness session.

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  2. Brett,
    You're right - I should have been more specific for the Kinect example, like Kinect Adventures (Rallyball, Reflex Ridge and Space Pop).

    On the DDR dance game front, I am the first one to tell people that MVPA is possible if given the right conditions, especially when given choice of song, levels, etc.

    Of course if you let yourself loose on the ExerGame Station, there's no doubt that VPA will be attained - but if you just tap or touch the pad, there's no way to collect VPA.

    However, I do feel that to get to vigorous physical activity (VPA) intensity levels on iDANCE or any other platform there needs to be a pretty high level of skill proficiency

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