chocolate milk vs sports drinks
DESCRIPTION
Effects of chocolate milk vs sports drinks such as Gatorade in recovery after exercise.TRANSCRIPT
The Effects of Sports Drinks Vs. Chocolate
Milk During Recovery
Matthew Patjawee
Shanna Porcari
Why is this Significant? Know what may be best/healthy
for your own body. Athletic trainers and Coaches
– Know what’s best for your athletes and their performance.
Pre-professional and Exercise and fitness – Understand what to suggest to patients when discussing exercise prescription and rehabilitation programs.
Overview Effects of sports drinks on the
body Nutrient comparison Gatorade Study Chocolate Milk Study Conclusion
Chocolate Milk vs. Gatorade
Gatorade: What’s in it? Gatorade is a 6% carbohydrate-
electrolyte sports beverage Along with putting water back into
your body sports drinks put in:› - electrolytes› - sodium› - potassium› - chloride
All of these minerals which are lost through sweat when we exercise
Palatability and voluntary intake of sports beverages, diluted orange juice, and water during exercise
Authors: Passe, Horn, Stofan, & Murray Year: 2009
Purpose The researchers investigated what
interacting factors affect fluid intake during and after exercise.
(Passe, Horn, Stofan, & Murray, 2009)
Methods Subjects: Fifty triathletes and runners (34
males and 16 females) Beverages:
› - Diluted orange juice (DOJ) › - Homemade 6% carbohydrate-electrolyte
sports beverage (HCE)› - Commercial 6% carbohydrate-electrolyte
sports beverage (CCE)› - Evian water (W)
all beverages were served in 16 oz. opaque bottles
(Passe, Horn, Stofan, & Murray, 2009)
Procedure Participants were in the lab for five sessions:
› - first session was an orientation› - four sessions: 75 minutes of exercise at 80-85%
max. age predicted HR During each exercise session they were only
given one of the four beverages Up to 15 participants exercised at a time and
they were discouraged from talking with one another.
Twice during the exercise session and after participants were given access to the drinks for a 60-sec break.(Passe, Horn, Stofan, & Murray, 2009)
Measurements Fluid intake was weighing the bottles
before and after consumption
Dehydration was determined by taking nude body weights pre- and post- exercise and expressing the difference in a percentage
Taste-related measure were obtained right after the two drink breaks.
(Passe, Horn, Stofan, & Murray, 2009)
Measurements Liking of beverage overall, flavor, sweetness
were measured by a 9-point hedonic category scale. Extremely like to Extremely Dislike
Descriptive characteristics/perceived intensity were measured using a 100-point descriptive line scale
Just About Right measure were taken using a 5-point category scale
(Passe, Horn, Stofan, & Murray, 2009)
Results
The participants who drank the Commercial sports beverage (CCE):› - highest levels of fluid intake› - least dehydrated› - highest overall accepted
beverage› - highest flavor approval› - just the right amount of flavor
content(Passe, Horn, Stofan, & Murray,
2009)
Conclusion Flavor is very important to get athletes to
voluntarily hydrate themselves during and after exercise to prevent “voluntary dehydration.”
The commercial sports drink (Gatorade) met the most needs in taste:› - sweetness› - saltiness› - overall flavor
It was also consumed in the highest quantities in comparison to the other available drinks.
(Passe, Horn, Stofan, & Murray, 2009)
Improved endurance capacity following chocolate milk consumption compared with two commercially available sports drinks
Authors: Thomas, Morris, & StevensonYear: 2009
(
ParticipantsConsisted of Nine male trained cyclistsMean age – 25Mean weight – 73kgMean Maximal Oxygen Uptake (VO2max) – 4.3 L/min Mean Associated Power (Pmax) – 33 W
All completed a pre exercise medical screening.
(Thomas, Morris, & Stevenson, 2009)
Procedures Reported to the lab between 8am and 9am
after an overnight fast. Refrain from any strenuous exercise and
arrive in a fully rested and hydrated state. Replicate their dietary intake 24 hours
before each session. All testing was used using a cycle
ergometer. Complete an incremental exercise test
followed by 3 experimental trials.(Thomas, Morris, & Stevenson, 2009)
Incremental Exercise Test
Self Determined Warm up Participants cycled at a chosen pedal
cadence (85-100 r/min) at a power output of 100W increased by 50W every 2 min. until exhaustion.
Instructed to maintain pedal cadence through test.
Chosen cadence was used on all other subsequent test occasions.
(Thomas, Morris, & Stevenson, 2009)
Experimental Trials 3 experimental trials separated by 1 week. Consumed chocolate milk, fluid replacement
(Gatorade), or Carbohydrate replacement (Endurox R4)› Volume of Carbohydrate Replacement drink was
calculated as 1g of protein per kg of body weight.› Isovolumetric amount of fluid replacement drink.› Chocolate milk calculated to be identical to
carbohydrate replacement drink. Participants were allowed to drink as much
water as they felt needed during the trials.(Thomas, Morris, & Stevenson, 2009)
Glycogen-depletion Trial Trial consisted of alternating 2 minute
intervals (60-90% Pmax) and recovery bouts (50% Pmax).
Began cycling at 90% Pmax alternating every 2 minutes until they could no longer maintain their chosen cadence.
Intensity would decrease 10% every time their cadence fell 10 r/min over a 30s time period.
Trial ended when participants could no longer maintain their chosen r/min at 60% Pmax.
(Thomas, Morris, & Stevenson, 2009)
Recovery Period Participants rested in lab for 4 hour
recovery period. Within 60s and at 2 hours into the
recovery after glycogen-depletion trial, participants were given a recovery drink.
Monitored psychological responses to drinks every 30 min.
Survey consisting on 11 mood and appetite questions.
(Thomas, Morris, & Stevenson, 2009)
Endurance Capacity Trial Following the recovery period
participants performed a cycle to exhaustion at 70% Pmax.
Heart Rate recorded every 5 minutes. Instructed to stay seated during the
trial. If participant fell more than 10 r/min for
20s they were given a warning. Second fault resulted in termination of trail then time was recorded.
(Thomas, Morris, & Stevenson, 2009)
Results No differences in exercise time for
initial glycogen depletion cycle. Analysis reveled a main effect on
the time in the endurance capacity cycle.› Chocolate Milk – 32 min› Fluid Replacement – 23 min› Carbohydrate Replacement- 21 min
(Thomas, Morris, & Stevenson, 2009)
Acute Effects of Chocolate Milk and a Commercial Recovery Beverage on Postexercise Recovery Indices and Endurance Cycling Perform
Authors: Pritchett, Bishop, Pritchett, Green & Katica
Year: 2009
Purpose To compare chocolate milk with a
isocaloric protein/carbohydrate equivalent beverage as a recovery aid.
Methods Approach: Randomized, Repeat-Measure
crossover design
Subjects: 10 regional level cyclist and triathletes› - minimum of 2 years of involvement in
endurance sports› - minimum of 6 training-hours per week
Beverages:› - Low Fat Chocolate Milk (CHOC)› - Endurox R4 chocolate (CRB)
Conclusion The chocolate milk was just as
effective as the Endurox. Ten out of 10 participants
preferred the taste of the chocolate.
Chocolate milk has appeal as a recovery aid because it is relatively inexpensive and readily available.
Gatorade vs. Chocolate Milk Conclusion
Gatorade, based on taste, encourages athletes to hydrate themselves more adequately in comparison to water and other available drinks.
However, chocolate milk provides protein along with additional vitamins and minerals which has been proven to help aid in recovery.
ConclusionNatures Recovery Drink
References Passe, D., Horn, M., Stofan, J., & Murray, R. (2004).
Palatability and voluntary intake of sports beverages, diluted orange juice, and water during exercise. International Journal of Sports Nutrition and Exercise Metabolism. 14, 272-284.
Pritchett, K., Bishop, P., Pritchett, R., Green, M., & Katica, C. (2009) Acute effects of chocolate milk and commercial recovery beverage on postexercise recovery indices and endurance cycling performance. Applied Physiology, Nutrition & Metabolism. 34(6) 1017-1022. doi:10.1139/H09-104
Thomas, K., Morris P., & Stevenson, E. (2009). Improved endurance capacity following chocolate milk consumption compared with 2 commercially available sports drinks. Applied physiology nutrition metabolism, 34, 78-82.
Discussion
What do you normally drink after a work out?
Discussion Have any of you heard of
chocolate milk being used as a recovery aid after exercise?
Discussion
Do you feel that the study of sports drinks are important in our field as Kinesiologists?
Discussion
Would you consider giving chocolate milk to your children after a sports practice or event compared to Gatorade?
Discussion
What do you think may be some of the downsides of chocolate milk?
Discussion Do you think chocolate milk may
have a future in the fitness retail market?