Patrick is 18 years old, weighs 80 kg, stands 178 cm tall with a body fat percen
ID: 3517164 • Letter: P
Question
Patrick is 18 years old, weighs 80 kg, stands 178 cm tall with a body fat percentage of 10.2%. Patrick plays hockey in the OHL and scouts have suggested to him he's a fringe NHL hockey prospect (based on skill), but that he needs to improve his conditioning in few areas if he hopes to play at a higher level.
During a combine test prep event, Patrick recorded the following numbers:
• Grip(strength: 148 lbs/
• Bench press (reps at 150 lbs): 10 reps
• Standing long jump: 113 in
• Vertical jump with pause: 33.5 in
• Pull ups: 6 reps
• Wingate ---> Average power: 8.8 watts/kg
Peak power: 12.1 watts/kg
• VO2 max: 42 ml/kg/min
On a normal day, Patrick consumes 2450 kcal (60% CHO, 15% PRO, 25% FAT) and drinks 4 L of fluid
a) Is Patrick consuming enough protein to support his needs as a hockey player?
b) Is his VO2 considered good and can he improve his it through training. If yes, how much would he be able to improve it if he trains properly
c) If we were to measure blood lactate at the end of his VO2 max test, what would be an expected recording?
d) How many grams of glycogen would we expect Patrick to have in total? ( 110, 250, 500, 1000 g)
e) What energy pathways is most significant to Patrick's on ice performance?
f) If Patrick wanted to improve his performance on combine testing, what compound would be the most helpful? (NO oxide booster, beta alanine, glutamine, Gatorade G2) Justify
Explanation / Answer
a) In this case the energy consumption is 2450kcal, out of which 15% is of protein , which equals to approximately 367kcal . Now , 1 gram of proteins produces 4 kcal of energy, so the amount of protein taken is almost 92 grams . Based on some studies , Athletes requires at least 1 gram of protein per unit kg of bodyweight to maintain the muscle mass . So Patrick , being 80 kg in weight is consuming enough protein to maintain the muscle mass . However , if he wants to increase the muscle mass , he needs to consume 1.4 to 1.8 gm per kg , that means 115-145gm of protein should be consumed .
b) Average VO2 max in ice hockey male players belonging to age group 10-30 is 50 to 65ml/kg/min. So, Patrick will need to improve his VO2 max through his training.
If Patrick gets proper aerobic training (running sprints , 5 point jumps etc) he can increase the VO2 max by even 25% of his present value . which equals to almost 8-9 ml/kg/min.
c) Blood lactate , is generally calculated as the percentage of the VO2 max . The amoumt of blood lactate at the end of endurance training depends on the lactate threshold, that is , the point during the excercise of increasing intensity at which blood lactate begins to accumulate above the resting levels.
As Patrick have lower VO2 max as compared to the ice hockey players of his age , the blood lactate levels would be higher in him .exact value can be calculated if we know the lactate threshold .
d) A human bosy can store glycogen upto 15 gms per kg of the bosy weight . So it can range from very minimum to very high (1200gms). But the body fat %age of Patrick ivery good , his glycogen levels should be low , as there are no fat , so glycogen is used as an instant energy expenditure rather than being stored . So would say it ranges between 250-500gms.
e) As ice hockey requires frequent sprints across the feilds which can last for 10-15 secs , the major energy pathway for this player will be fast glycolytic pathway (ATP PCr glycolysis) which can produce lactate.
f) no oxide booster as they help in recovery of muscle damage during the training , along with providing energy for the training.