Answer:
Increase peak force production.
Explanation:
Optimum Performance Training may be defined as the training fitness system developed by the NASM. This model is mainly based on the scientific experiments and results.
The five different training phase of this model are stabilization endurance, strength endurance,maximal strength, hypertrophy and power. This model mainly increase the the peak force production and the individual can attain the fitness and goals.
Thus, the correct answer is option (d).
Answer:I don't know.
Explanation:Maybe because that's something you might enjoy doing or it makes it easier for you to eat.
<span>The effects of stimulants<span> on the brain
causes disruption of brain<span> neurons or
modifying the normal communication that occurs among brain<span> circuits.
They are referred as substances that increase certain types of cell signaling
and amplify various physiologic processes throughout the </span></span>brain and body.
Moreover, the effects of stimulant includes
the brain processes of sensory information throughout the body, muscle movement
and locomotion, bodily functions, thoughts and feelings, perception and moods and
thus, create disturbance over the controls of all behavior.</span></span>
Answer:
Explanation:
Forehand groundstroke effectiveness is important for tennis success. Ball topspin angular velocity (TAV) and accuracy are important for fore hand groundstroke effectiveness, and have been extensively studied, previously; despite previous, quality studies, it was unclear whether certain racquet kinematics relate to ball TAV and shot accuracy during the forehand groundstroke. This study evaluated potential relationships between (1) ball TAV and (2) forehand accuracy, and five measures of racquet kinematics: racquet head impact angle (i.e., closed or open face), horizontal and vertical racquet head velocity before impact, racquet head trajectory (resultant velocity direction, relative to horizontal) before impact, and hitting zone length (quasi-linear displacement, immediately before and after impact). Thirteen collegiate-level tennis players hit forehand groundstrokes in a biomechanics laboratory, where racquet kinematics and ball TAV were measured, and on a tennis court, to assess accuracy. Correlational statistics were used to evaluate potential relationships between racquet kinematics, and ball TAV (mixed model) and forehand accuracy (between-subjects model; α = 0.05). We observed an average (1) racquet head impact angle, (2) racquet head trajectory before impact, relative to horizontal, (3) racquet head horizontal velocity before impact, (4) racquet head vertical velocity before impact, and (5) hitting zone length of 80.4 ± 3.6˚, 18.6 ± 4.3˚, 15.4 ± 1.4 m·s-1, 6.6 ± 2.2 m·s-1, and 79.8 ± 8.6 mm, respectively; and an average ball TAV of 969 ± 375 revolutions per minute. Only racquet head impact angle and racquet head vertical velocity, before impact, significantly correlated with ball TAV (p < 0.01). None of the observed racquet kinematics significantly correlated to the measures of forehand accuracy. These results confirmed mechanical logic and indicate that increased ball TAV is associated with a more closed racquet head impact angle (ranging from 70 to 85˚, relative to the ground) and increased racquet head vertical velocity before impact.
