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Title

Dose Response Oxidation of a Sweet-corn Derived Sugar (PhytoSpherix) During Exercise in Endurance Trained Athletes
Dose Response Oxidation of a Sweet-corn Derived Polysaccharide (PhytoSpherix) During Exercise in Endurance Trained Athletes

  • Phase

    N/A

  • Study Type

    Interventional

  • Status

    Unknown status

  • Intervention/Treatment

    phytospherix ...

  • Study Participants

    8
PhytoSpherix (Phx) is an all-natural, edible polysaccharide extracted from sweet corn. This carbohydrate is the major muscle fuel for intense exercise and its stores are quite small such that one can run out of it during a single exercise bout. Therefore, Phx should provide significant exercise fuel if consumed during exercise. As a result its intake could enhance intense exercise performance by providing additional fuel. This experiment Will investigate the effects of 4 different dosages of Phx consumed throughout a prolonged exercise bout on carbohydrate and fat utilization as well as its oxidation rate and perception of effort during prolonged intense exercise in trained cyclists. Muscle and liver carbohydrate stores will be examined using a non-invasive ultrasound technique.
Carbohydrate (CHO) is one of the main substrate oxidized during moderate-to-high intensity, endurance-type exercise. It's been shown that CHO feeding during exercise enhances endurance performance and capacity, attributed mainly to the facilitation of greater rates of exogenous CHO oxidation, prevention of hypoglycaemia and sparing of muscle glycogen. Previous studies based on supplementation of glucose during 180 min. of cycling exercise have reported a maximal rate of exogenous CHO oxidation to be about 1 g/min. Other studies have shown that CHO oxidation rates can reach peak values of about 1.3 g/min when a combination of fructose and glucose is ingested at a rate of 1.8 g/min. The limitation in uptake and oxidation of a single CHO source is attributed to its intestinal transporter saturation such that when multiple CHO source is used the uptake and oxidation rate is increased to a greater extent. Currently there is no information regarding Phx uptake or oxidation rate as a CHO source during exercise. Also, it is important to investigate whether Phx as a CHO sport drink can increase performance by sparing muscle and liver glycogen during exercise. Therefore, the objective of this experiment is to measure dose response of Phx oxidation rate during prolonged cycling exercise and its effect on muscle and liver glycogen levels.
Study Started
Sep 30
2016
Primary Completion
Sep 30
2017
Anticipated
Study Completion
Sep 30
2017
Anticipated
Last Update
Sep 22
2016
Estimate

Dietary Supplement Use of PhytoSpherix at 2 g/min

PhytoSpherix (Sweet-corn derived sugar) will be fed at 2 g/min during a 150 min cycling exercise

Behavioral Cycling exercise

Male endurance athletes will complete a cycling exercise for 150 min at 50% of their respective maximum wattage

Dietary Supplement Use of PhytoSpherix at 0 g/min

PhytoSpherix (Sweet-corn derived sugar) will be fed at 0 g/min during a 150 min cycling exercise

Dietary Supplement Use of PhytoSpherix at 1 g/min

PhytoSpherix (Sweet-corn derived sugar) will be fed at 1 g/min during a 150 min cycling exercise

Dietary Supplement Use of PhytoSpherix at 1.5 g/min

PhytoSpherix (Sweet-corn derived sugar) will be fed at 1.5 g/min during a 150 min cycling exercise

Endurance trained male cyclists Experimental

8 male endurance trained male cyclist will consume varying amounts (0, 1, 1.5 and 2 g/min) of PhytoSpherix (sweet-corn derived sugar) during a 150 min . cycling exercise

Criteria 

Inclusion Criteria:

Healthy male endurance trained athletes with >2 y cycling experience; about 2 h/day

Exclusion Criteria:

Unhealthy athletes, smokers
No Results Posted