⇒ Heart disease in not an inevitable part of growing older. Usually you develop heart disease between the age of 40-55. If you reach the age of 50 without developing the major risk factors for heart disease, you can live a full life without it, and your chances of dying from heart disease decrease from 50 percent to a strikingly low 8 percent. Here are some everyday tasks everyone can use and/or take to prevent heart disease:
1.) Don't use tobacco products.
2.) Exercise for 30 minutes 3-4 times a week.
3.) Eat a heart-healthy diet/meal.
4.) Maintain a healthy weight.
5.) Get regular health screenings.
6.) Try to manage stress.
I hope that this helps you out. I am very good with heath and doctor questions and problems. I study this kind of stuff everyday. Good Luck!
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.
Histamin is associated with the answer of the body to allergy factors, gastrin and secretin are out of the question.
2nd trimester sounds like it would be about that time that it would be contacted with the uterus
Stimulants :
c. can excite the central nervous system.
