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Luis Fernando Aragonvargas - One of the best experts on this subject based on the ideXlab platform.

  • postexercise rehydration potassium rich Drinks versus water and a Sports Drink
    Applied Physiology Nutrition and Metabolism, 2014
    Co-Authors: Alexandra Perezidarraga, Luis Fernando Aragonvargas
    Abstract:

    Fluid retention, thirst quenching, tolerance, and palatability of different Drinks were assessed. On 4 different days, 12 healthy, physically active volunteers (24.4 ± 3.2 years old, 74.75 ± 11.36 kg body mass (mean ± S.D)), were dehydrated to 2.10% ± 0.24% body mass by exercising in an environmental chamber (32.0 ± 0.4 °C dry bulb, 53.8 ± 5.2% relative humidity). Each day they drank 1 of 4 beverages in random order: fresh coconut water (FCW), bottled water (W), Sports Drink (SD), or potassium-rich Drink (NEW); volume was 120% of weight loss. Urine was collected and perceptions self-reported for 3 h. Urine output was higher (p 0.05). Fluid retention was higher for SD than W (68.2% ± 13.0% vs. 51.3% ± 12.6%, p = 0.013), but not for FCW and NEW (62.5% ± 15.4% and 65.9% ± 15.4%, p > 0.05). All beverages were palatable and well tolerated; none maintained a positive net fluid balance after 3 h, but deficit was greater in W versus SD (p = 0.001). FCW scored higher for sweetness (p = 0.03). Thirst increased immediately after exercise but returned to baseline after Drinking a small volume (p < 0.0005). In conclusion, additional potassium in FCW and NEW did not result in additional rehydration benefits over those already found in a conventional Sports Drink with sodium.

David Kastenberg - One of the best experts on this subject based on the ideXlab platform.

  • randomised clinical trial polyethylene glycol 3350 with Sports Drink vs polyethylene glycol with electrolyte solution as purgatives for colonoscopy the incidence of hyponatraemia
    Alimentary Pharmacology & Therapeutics, 2014
    Co-Authors: Rebecca Matro, Constantine Daskalakis, Dan Negoianu, Leo Katz, Cassandra Henry, Michael Share, David Kastenberg
    Abstract:

    SummaryBackground Polyethylene glycol 3350 plus Sports Drink (PEG-SD) is a hypo-osmotic purgative commonly used for colonoscopy, though little safety data are available. Aim To evaluate the effect of PEG-SD on serum sodium (Na) and other electrolytes compared with PEG-electrolyte solution (PEG-ELS). Methods We performed a single center, prospective, randomised, investigator-blind comparison of PEG-ELS to PEG-SD in out-patients undergoing colonoscopy. Laboratories were obtained at baseline and immediately before and after colonoscopy. The primary endpoint was development of hyponatraemia (Na <135 mmol/L) the day of colonoscopy. Changes in electrolyte levels were computed as the difference between the lowest value on the day of colonoscopy and baseline. Purgative tolerance and efficacy were assessed. Results A total of 389 patients were randomised; 364 took purgative and had baseline and day of colonoscopy labs (180 PEG-SD, 184 PEG-ELS). The groups were well matched except for a higher fraction of women and Blacks in PEG-ELS. Seven patients (3.9%) in PEG-SD and four patients (2.2%) in PEG-ELS developed hyponatraemia (OR = 1.82, 95% CI: 0.45–8.62, P = 0.376). Changes in electrolytes from baseline were small but significantly worse with PEG-SD for sodium, potassium and chloride (P = 0.001, 0.012, 0.001, respectively). Preparation completion, adverse events, and overall colon cleansing were similar between the groups, but PEG-ELS had more excellent preparations (52% vs. 30%; P = 0.001). Conclusions Greater, but very modest, electrolyte changes occur with PEG-SD. Hyponatraemia is infrequent with both purgatives. A significant increase in hyponatraemia was not identified for PEG-SD vs. PEG-ELS, but the sample size may have been inadequate to identify a small, but clinically important difference. ClinicalTrials.gov identifier NCT01299779.

Michael Leveritt - One of the best experts on this subject based on the ideXlab platform.

  • the effect of ad libitum consumption of a milk based liquid meal supplement vs a traditional Sports Drink on fluid balance after exercise
    International Journal of Sport Nutrition and Exercise Metabolism, 2016
    Co-Authors: Brenton J Baguley, Michael Leveritt, Jessica Zilujko, Ben Desbrow, Christopher Irwin
    Abstract:

    The aim of this study was to compare the effect of ad libitum intake of a milk-based liquid meal supplement against a carbohydrate-electrolyte Sports Drink following exercise induced fluid loss. Seven male participants (age 22.3 ± 3.4 years, height 179.3 ± 7.9 cm, body mass 74.3 ± 7.3 kg; mean ± SD) completed 4 separate trials and lost 1.89 ± 0.44% body mass through moderate intensity exercise in the laboratory. After exercise, participants consumed ad libitum over 2 h a milk-based liquid meal supplement (Sustagen Sport) on two of the trials (S1, S2) or a carbohydrate-electrolyte Sports Drink (Powerade) on two of the trials (P1, P2), with an additional 1 hr observational period. Measures of body mass, urine output, gastrointestinal tolerance and palatability were collected throughout the recovery period. Participants consumed significantly more Powerade than Sustagen Sport over the 2 h rehydration period (P1 = 2225 ± 888 ml, P2 = 2602 ± 1119 mL, S1 = 1375 ± 711 mL, S2 = 1447 ± 857 ml). Total urine output on both Sustagen trails was significantly lower than the second Powerade trial (P2 = 1447 ± 656 ml, S1 = 153 ± 62 ml, S2 = 182 ± 118 mL; p < .05) and trended toward being lower compared with the first Powerade trial (P1 = 1057 ± 699 ml vs. S1, p = .067 and vs. S2, p = .061). No significant differences in net fluid balance were observed between any of the Drinks at the conclusion of each trial (P1 = −0.50 ±0. 46 kg, P2 = −0.40 ± 0.35 kg, S1 = −0.61 ± 0.74 kg, S2 = −0.45 ± 0.58 kg). Gastrointestinal tolerance and beverage palatability measures indicated Powerade to be preferred as a rehydration beverage. Ad libitum milk-based liquid meal supplement results in similar net fluid balance as a carbohydrate-electrolyte Sports Drink after exercise induced fluid loss.

  • effectiveness of commercial versus homemade Sports Drinks on fluid balance and exercise capacity during high intensity intermittent exercise
    American Journal of Sports Science and Medicine, 2015
    Co-Authors: Gulshanara Begum, Maria Konstantaki, Adam Cunliffe, Michael Leveritt
    Abstract:

    Commercial Sports Drinks are used widely by athletes involved in high-intensity intermittent (HII) exercise. However, little has been reported on their relative effectiveness compared to simple homemade Drink formulations. The purpose of this study was to investigate the effects of different Sports Drink formulations (commercial v homemade), water and no Drink on fluid balance and exercise capacity during HII exercise. Twelve trained men (age: 27 ± 2.1 y) performed a 90-min HII running protocol designed to simulate activity experienced during a football match. The protocol was arranged in six 15-min stages where running speeds ranged between 55% and 120% of VO2max. The HII protocol included half-time and a run to fatigue post 90 min. Using a single-blind, randomized, cross-over design, participants ingested a preload of 5 ml⋅kg-1 10 min before HII exercise and 3 ml⋅kg-1 every 15 min of either Isostar® (ISO), a homemade Sports Drink (CHO), placebo (P) or no Drink (ND). Blood lactate (Hla), blood glucose (Bgluc), heart rate (HR) and ratings of perceived exertion (RPE) were measured before, during (every 15 min) and after the 90-min HII protocol. Changes in plasma volume were measured at half-time and post 90 min. Sweat rate and fluid balance were calculated post each trial. Time to fatigue (TTF) was recorded at exhaustion. In the ND trial, TTF decreased by approximately 17%, 28% and 43% compared to P, CHO and ISO, respectively (p 0.05). No differences were noted in HLa, RPE, PV or SR between the trials (p>0.05) but there were significant effects of time (p<0.05). Bgluc peaked at 30 minutes in ISO and CHO, but dropped by ~27% in ISO and by ~30% in CHO after half time. Absence of fluid ingestion surprisingly had no significant effect on altering plasma volume or decreasing sweat rate despite causing noticeable decreases in exercise capacity. The homemade Drink improved exercise capacity in a similar manner to that of the commercial Drink, but neither Sports Drink achieved superior hydration compared to water. Ingestion of exogenous carbohydrate through Sports Drink consumption caused an exercise-induced glycemic response when exercise was restarted after half-time. This decline in blood glucose after half-time appears to be marginally attenuated in P trial. A possible suggestion for team Sports could be to Drink water rather than Sports Drink prior to half-time period.

  • beer as a Sports Drink manipulating beer s ingredients to replace lost fluid
    International Journal of Sport Nutrition and Exercise Metabolism, 2013
    Co-Authors: Ben Desbrow, Daniel Murray, Michael Leveritt
    Abstract:

    loss during exercise and were consumed over a 1h period. Body mass and urine samples were obtained before and hourly for 4 hr after beverage consumption. Results: Significantly enhanced net fluid balance was achieved following the LightBeer+25 trial (–1.02 ± 0.35 kg) compared with the Beer (–1.59 ± 0.32 kg) and Beer+25 (–1.64 ± 0.28 kg) treatments. Accumulated urine output was significantly lower in the LightBeer+25 trial (1477 ± 485 ml) compared with the Beer+25 (2101 ± 482 ml) and Beer (2175 ± 372 ml) trials. Conclusion: A low alcohol beer with added sodium offers a potential compromise between a beverage with high social acceptance and one which avoids the exacerbated fluid losses observed when consuming full strength beer.

Luis Fernando Aragon Vargas - One of the best experts on this subject based on the ideXlab platform.

Ronald J Maughan - One of the best experts on this subject based on the ideXlab platform.

  • limitations stated by the authors we suggest that the results of the study though may be useful are not ready for prescribing fluid intake guidelines during endurance kayaking
    2008
    Co-Authors: Jason K. W. Lee, Chin Leong Lim, Ronald J Maughan, Jason Kai, Wei Lee, J G Verbalis, T D Noakes, Scott J Montain
    Abstract:

    published in the recent April Sports Medicine edition. Thestudy investigated fluid balance associated with endurancekayaking and evaluated the efficacy of hydration withwater versus a commercially available Sports Drink. Wecongratulate the authors for profiling the fluid loss incurredduring kayaking, in which information specific to the sporthas not been well documented. However, we are concernedwith the proposed hydration recommendations made by theauthors. While several of the limitations in the study arealready mentioned by the authors, we would like to highlightother concerns to ensure a more balanced reading of the“take home message” for the readers.In both trials, it was reported that the paddlers weredehydrated by 0.72 ± 0.38% (~ 0.44 kg) and 1.10 ± 0.52%(~ 0.68 kg) when consuming (

  • milk as an effective post exercise rehydration Drink
    British Journal of Nutrition, 2007
    Co-Authors: Susan M. Shirreffs, Phillip Watson, Ronald J Maughan
    Abstract:

    (Received 14 July 2006 – Revised 19 January 2007 – Accepted 24 January 2007) The effectiveness of low-fat milk, alone and with an additional 20mmol/l NaCl, at restoring fluid balance after exercise-induced hypohydration was compared to a Sports Drink and water. After losing 1·8 (SD 0·1) % of their body mass during intermittent exercise in a warm environment, eleven subjects consumed a Drink volume equivalent to 150% of their sweat loss. Urine samples were collected before and for 5h after exercise to assess fluid balance. Urine excretion over the recovery period did not change during the milk trials whereas there was a marked increase in output between 1 and 2h after Drinking water and the Sports Drink. Cumulative urine output was less after the milk Drinks were consumed (611 (SD 207) and 550 (SD 141) ml for milk and milk with added sodium, respectively, compared to 1184 (SD 321) and 1205 (SD 142) ml for the water and Sports Drink; P,0·001). Subjects remained in net positive fluid balance or euhydrated throughout the recovery period after Drinking the milk Drinks but returned to net negative fluid balance 1h after Drinking the other Drinks. The results of the present study suggest that milk can be an effective post-exercise rehydration Drink and can be considered for use after exercise by everyone except those individuals who have lactose intolerance. Rehydration: Milk: Water balance: Exercise