Running Slopes and Power Performance
Condition: Healthy
Study type: Interventional

Summary: 
      The objective of the present study was to determine the effect of interval session running at
      high intensity with 1% or 10% gradient on the height of the drop jump. The cinematic
      variables concentric phase, eccentric and contact time were compared after the running
      session in both conditions in order to explain possible changes in the jump performance. The
      investigators theorize that the lower eccentric overload in the running to 10% inclination
      promotes higher deleterious effect on power performance of the lower limbs
    

Detailed description: 
      Physical training programs are typically composed of activities directed to the development
      of different valences usually stimulated in the same session. When aerobic activities of long
      duration prior isokinetic strength exercises, isotonic, or explosive, deleterious effects
      seem to be induced on performance of these valences. These short and long-term changes in
      muscle strength and power would be directly associated with repetitive eccentric loads that
      characterize the endurance running. Gradual increases in the running slope were inversely
      associated with a proportional reduction in the eccentric loads, which in turn would result
      in less muscle damage to intra and extrafusal fibers. So, the change in the slope of the race
      would emerge as an optional way to neutralize the competitive effect on the power
      performance. The research consisted of five visits. At the initial visit was conducted
      familiarization to vertical drop jump, and immediately after, the determination of VO2max
      values and their associated speed (vVO2max). The second visit was a new familiarization for
      the vertical drop jump followed immediately determining the Time to exhaustion performance in
      vVO2max (100% of VO2Max). Two jumps were performed on each of the three selected heights (20,
      30 and 40 cm) were used in the experimental sessions and control only the height associated
      with the highest performance. In subsequent visits (third to fifth), participants performed
      three maximum jumps before and about 10 min after the following conditions: high intensity
      Interval running a 10% gradient (C10%), 1% grade (C1%) and control condition (CON).
    

Intervention name(s): Interval Training at 1% incline; Interval Training at 10% incline
Intervention type(s): Other; Other
Intervention description(s): Six stimuli were performed to exhaustion. The vertical drop jump strategy (height and kinematics) served to establish the magnitude of the concurrent effect; Six stimuli were performed to exhaustion. The vertical drop jump strategy (height and kinematics) served to establish the magnitude of the concurrent effect.
Other intervention name(s): HIIT at 1%; High Intensity Interval Training at 1%; HIIT at 10%; High Intensity Interval Training at 10%
Intervention MeSH terms: Dihydrotachysterol
Allocation: Randomized
Intervention model: Single Group Assignment
Masking: None (Open Label)
Keywords: Drop Jump; High Intensity Interval Training; Muscle Fatigue; Aerobic Performance