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WATCH: Dr. Portman's Father's Day Skydive With 2nd Surge

Posted by Dr. Robert Portman on 6/25/2018 to News
WATCH: Dr. Portman's Father's Day Skydive With 2nd Surge
For Father's Day this year, Dr. Portman and his son, Jon, got together for a day of father-son bonding. Some dads like a relaxing day of fishing, some play golf, and some take to the sky to share a rush of adrenaline. Check out the video here and see how he did!  

Avoid GI Upset

Posted by Dr. Robert Portman on 6/25/2018 to Performance Tip Of The Week
Avoid GI Upset
Up to 70% of endurance athletes experience GI problems during an event.  The symptoms can cause mild discomfort or be so debilitating the athlete has to withdraw. The reason GI distress is so common in endurance events is that, during intense exercise, 80% of the blood that normally goes to the GI tract is shunted to the muscles thereby affecting the movement of food from the small intestine. Here are some ways to minimize GI upset:

The Myth Of Long-Acting Carbohydrates

Posted by Dr. Robert Portman on 6/18/2018 to Performance Tip Of The Week
The Myth Of Long-Acting Carbohydrates
One of the more persistent myths in sports nutrition is the idea that long-acting carbohydrates offer an endurance advantage. This myth is perpetuated by the manufacturers of sports drinks and recovery drinks containing long-acting carbs, who trot out data showing that long-acting carbs provide a more sustained level of blood glucose than fast-acting carbs. Most educated consumers equate steady blood glucose with sustained energy. Manufacturers rely on this association to suggest that, by providing sustained levels of blood glucose, their products containing long-acting carbs also delay fatigue better than products using fast-acting carbs. In fact, just the opposite is true. Here’s why.

New Tool To Calculate Your Fluid And Nutrition Workout Needs

Posted by Dr. Robert Portman on 6/11/2018 to Performance Tip Of The Week
New Tool To Calculate Your Fluid And Nutrition Workout Needs
The question I get most frequently from athletes is about how much fluid and nutrition should be consumed during workouts and races. In spite of the data, athletes in all sports and at all levels have found it a challenge to create an appropriate personal nutrition plan.  When insufficient fluid and nutrition is consumed, muscle fatigue occurs.  When too much fluid or nutrition is consumed, GI distress can result.

Insulin And Lean Body Mass

Posted by Dr. Robert Portman on 6/4/2018 to Performance Tip Of The Week
Insulin And Lean Body Mass
A general misconception is that insulin is only involved in energy and fat metabolism.  When energy needs are high, insulin transports sugar from the blood into the muscle where it can be converted into energy.  When energy needs are low, insulin facilitates the conversion of excess sugar into fat where it can be stored for future use.