Showing posts with label cardio. Show all posts
Showing posts with label cardio. Show all posts

Thursday, 26 February 2015

Ask An Olympian: Can Food Really Improve Your Athletic Performance?


Ask An Olympian: Can Food Really Improve Your Athletic Performance?
Like with everything else, when you reach a plateau you must go into reset mode and it’s really not that complicated – just hard to maintain until you’re able to live it and breathe it. Simply put, if you want to become faster and stronger, pay attention to the foods that you eat. Achieving and maintaining the proper levels of the right nutrients is the key to peak performance. So what are some of the main nutrients necessary to build and maintain a strong body?
Luke Walton, USA Olympic Rower suggests “HYDRATION is key to proper nutrition. There are too many positive effects of water to list here. Flushing toxins is one big one! Hydrating muscles, cells, etc. Water also aids proper digestion and absorption”.
Walton also suggest healthy fats. The kind found in avocado, coconut oil, flax seed oils, nuts, etc. “Too many people try to avoid fat completely and that is a terrible thing to do, especially for endurance athletes”.
Calcium is probably the most important nutrient for an athlete and calcium intake should be monitored by those who train seriously and consistently. Calcium is essential in the growth, maintenance, and repair of bone tissue, maintenance of blood calcium levels, regulation of muscle contraction, nerve conduction, and normal blood clotting. So it’s no shocker that low levels of calcium can increase the risk of low bone mineral density and stress fractures. And recent research shows that male endurance athletes of all ages experience testosterone deficits that can also cause osteoporosis. Say what?! Ok so let’s make sure we stock up on those dairy foods like milk, yogurt, and cheese, as well as dried beans and leafy green vegetables. Dairy intolerant? Then make sure you find the right supplements.
Iron is an essential nutrient and part of hemoglobin, which is a protein in the blood that transports oxygen to all the cells in your body. The brain has a big demand for oxygen. Shocker! That being said, without proper levels of iron in your system, you will find it hard to concentrate and will start feeling tired and irritable. Inadequate iron levels can decrease the delivery of oxygen to tissues and therefore reduce the capacity of muscles to use oxygen for the production of energy. Athletes have higher iron needs which puts them at a higher risk to experience iron deficiency (did you know that iron is lost in sweat?). So to improve your iron levels, be sure to increase your intake of iron-rich foods like red meat, rice, wheat, oats, nuts, dark leafy greens, dried fruit, beans, iron-fortified cereals, breads and pasta.
Here is a great article on Blood Iron Levels and Athletic Performance article by the Inside Tracker you might find helpful.
Proper levels of Protein will help maintain a good metabolism rate, good recovery times and will decrease susceptibility to infections. Interesting fact: endurance athletes need more protein than strength athletes because endurance athletes use protein primarily for maintaining aerobic metabolism, while the strength athletes use it to increase tissue-repair needs. In short, protein helps replenish depleted energy stores and prepares your body for its next workout, and in case of a protein deficit the body will take its needed dose from lean tissue. Not good! So make sure you get your daily protein requirements. Animal protein sources include meat, poultry, seafood, eggs, and dairy products but if you’re a vegetarian get them from plant-based sources such as beans, peas, nuts, and soy products. I mean, who doesn’t like peanut butter?
Photo: Anna Mos, amosportfolio.com
Photo: Anna Mos, amosportfolio.com
Article Source: http://lordwallington.com/ask-an-olympian-can-food-really-improve-your-athletic-performance/

What do you guys think of this article?

Saturday, 21 February 2015

Time of Day Affects Athletic Performance

Researchers have found that an individual’s personal circadian rhythms can affect the physiological processes that are integral to athletic performance. Based on their natural circadian rhythms, athletes were classified into either “larks”, those who rise and sleep early, “owls”, those who rise and sleep late, or intermediates. Larks and intermediates hit peak performance levels six hours after they woke up while owls peaked 11 hours after waking up (1).
Running man
Larks and intermediates have better athletic performances about 6 hours after they wake up while owls best perform 11 hours after waking up​.
20 field hockey players were selected as a representative group with fitness levels and circadian rhythms matching the general population (25% larks, 50% intermediates, and 25% owls). Researchers conducted cardiovascular testing six times a day. Across individuals, there was an average performance difference of 11.2% between the lowest and highest performance. Lark and intermediate performance changes ranged from 7% to 10% whereas owl performances had an average range of 26% (1).
The larger variance in owls may explain why a majority of elite athletes are larks (2). Even a difference of 1% in performance can drastically change results. In the 2008 Beijing Olympics a 1% increase in the performance of the fourth place competitor in the men’s 100 m sprint would have resulted in a silver medal. A 1% increase in the women’s 400 m spring and 400 m freestyle would have given the fourth place a gold.
Larks, intermediates, and owls performed best at difference times of the day. However, when the data was viewed based on each individual’s biological clock rather than standardized time, larks and intermediates had nearly identical performance curves. This suggests that sleep and waking times have a relatively small effect on performance and a physiological condition controls performance (1).
A possible explanation is that larks have higher cortisol levels in the morning and more variation in cortisol levels throughout the day whereas owl have lowered cortisol levels in the morning and static cortisol levels throughout the day (3).
Article Source: http://dujs.dartmouth.edu/news/time-of-day-affects-athletic-performance#.VOmCfrOUd2c
Sources:
1. ScienceDirect (2015). The Impact of Circadian Phenotype and Time since Awakening on Diurnal Performance in Athletes. Retrieved January 31, 2015 from http://www.sciencedirect.com/science/article/pii/S096098221401639X
2. Br. J. Sports Med. (2012). Sleep quality evaluation, chronotype, sleepiness and anxiety of Paralympic Brazilian athletes: Beijing 2008 Paralympic Games. Retrieved January 31, 2015 from http://www.sciencedirect.com/science/article/pii/S096098221401639X
3. Biol. Psychol. (1991) Morningness-eveningness and early-morning salivary cortisol levels. Retrieved January 31, 2015 from http://www.sciencedirect.com/science/article/pii/S096098221401639X