Tag Archives: exercise for women

Can Carnitine Help Enhance Exercise Performance?

Feel like your workouts aren’t going so well? Perhaps carnitine supplements may be of use to reach your fitness goals. 

The compound carnitine is synthesized from amino acids lysine and methionine. Its role is to transport fatty acids from the cytosol to the mitochondria to help break down lipids and fats in order to create metabolic energy. The majority of carnitine is found in skeletal muscle, helping maintain co-enzyme A by creating acetylcarnitine during high intensity exercise.

In a study done by Maastricht University in the Netherlands, researchers Benjamin Wall, Francis Stephens, Dumitru Constantin-Teodosiu, Kanagaraj Marimuthu, Ian Macdonald and Paul Greenhaff hypothesized that chronic ingestion of L-carnitine and carbohydrates would increase skeletal muscle total carnitine content in healthy participants, generating various positive metabolic effects of muscle carnitine loading that would lead to an improvement in high intensity exercise performance.

For the double-blind experiment, 14 healthy, athletic male participants were used. Two weeks before the start of the trial, the participants were pre-tested for maximal oxygen consumption so individual exercises could be determined to use 50% and 80% of their maximal oxygen uptake.

For the trial phase, the subjects were to undergo the experimental protocol on three occasions, 12 weeks apart. Blood samples were collected to assess blood glucose, serum insulin and plasma total cholesterol concentration. The participants exercised for 30 mins on a cycle ergometer at 50% maximal oxygen intensity, followed by 30 mins of exercise at 80% maximal oxygen consumption. Immediately after the exercises, the participants performed a 30-min work output performance test to measure endurance and performance.

After the first experimental visit, the participants were randomly assigned to two treatment groups. The control group consumed 700 mL of a beverage containing 80 grams of carbohydrate polymer twice daily for 168 days.

The experimental group consumed the same amount of beverage but with an additional 2 grams of L-carnitine tartrate, at the same frequency. On every visit, the same exercise protocol was conducted as the first visit. Blood samples and muscle biopsy samples were also collected from the participants throughout.

The effect of L-carnitine on muscle total carnitine content and exercise performance

After evaluating the data, the researchers found that after 24 weeks muscle total carnitine content was 30% more in the carnitine group than the control, meaning a 21% increase from baseline.

This is the first study conducted that demonstrated muscle carnitine content can be increased by dietary intake in humans. It also showed carnitine plays a role in the fuel metabolism of skeletal muscle, dependent on intensity of exercise.

The researchers also found that work output was 35% greater for the carnitine group compared to the control, by the end of the trial. This represented a 11% increase from baseline measures. By increasing muscle total carnitine content, muscle carbohydrate use is reduced during low intensity exercise. For high intensity exercise, muscle carnitine reduces muscle anaerobic energy due to its enhanced generation of glycolytic, pyruvate dehydrogenase complex and mitochondrial flux.

Working as a combination, these metabolic effects lead to a reduced perceived effort but increased output, helping improve exercise performance.

Source: http://www.ncbi.nlm.nih.gov/pubmed/21224234

Amino Acids for Women who Exercise

When it comes to women, amino acids definitely have their place as far as supplements go. Amino acids play a crucial role in women’s health because they are the building blocks of proteins, and affect hair, bone, skin, and even hormones and exercise, plus muscles, tissues and organs. There are some amino acid supplements for women that you can take to aid exercising regimes, which can be purchased at supermarkets or vitamin shops.

Amino acids supplements

Amino acids for women are the same as they are for men. There are 22 amino acids that are broken down into these categories: essential amino acids, and non-essential amino acids, as well as semi-essential or conditional aminos. Amino acids can be taken in the form of capsules but they also come from protein foods like meats (beef, lamb, fish, chicken, turkey, pork, and even eggs) and dairy, beans, and nuts.

Taking amino acids for women can help boost fat burning and muscle building, and should be taken along with proper exercise and a healthy diet in order to keep a fit physique and lean and strong muscles.

Amino Acids for Women:

L-arginine:
L-arginine is a precursor to nitric oxide (NO), which helps keep the body healthy. L-arginine also dilates blood vessels, which allows for better blood flow and delivery of nutrients to the muscles for fat burning. Arginine also boosts HGH (human growth hormone) that comes from the pituitary gland. HGH also helps with women who have low testosterone levels, which does less for muscle burning, but more for fat burning. 3-5g in the morning and a half an hour before bed or exercise will do the trick.

L-glutamine:
Another of the amino acids for women is L-glutamine, which enhances the recovery time for muscles after they’ve been used or damaged. Glutamine also helps with energy, fat burning, and boosts immunity. If you are dieting or doing some really intense workouts you can lose muscle and metabolic function, but glutamine protects lean muscle from breaking down when the muscles are stressed. Stressed muscles can trigger the cortisol-connection. Cortisol, which is a stress hormone, can actually stop fat burning and promote the storage of fat in those troublesome areas like the buttocks, hips, and thighs.

L-carnitine:
One of the well-known amino acids for women is L-carnitine. Carnitine plays a role in energy production (co-factor). Cells cannot make energy without carnitine’s help because it is what transports fatty acids into the mitochondria, which in turn produce the energy. Carnitine is also one of those amino acids for women with the nitric oxide connection, which is a systemic gas that helps bring faster results when working out in the gym. Heart health is also boosted in women, thanks to carnitine, since the heart muscle requires heavy energy production so it can beat efficiently. You can take 1-3g of carnitine up to three times per day.

Beta-Alanine:
Beta-alanine is also one of the amino acids for women that I will cover today. Beta-alanine increases the intramuscular levels of L-carnosine (don’t confuse it with L-carnitine above). Carnosine buffers lactic acid levels in the cells of muscles. Lactic acid is what builds up and makes your muscles feel sore after an extra-long or extra-hard workout or muscle contraction. Lactic acid makes you feel the “burn” in the muscles. Carnosine buffers and allows you to work harder or longer in the gym. Taking beta-alanine also can be taken with creatine to further boost body fat loss and muscle building. Take 1-3 g just before and after your workouts.

BCAA’s:
Last but not least, BCAA’s (branched-chain amino acids) are also amino acids for women, which helps the female body to lose weight fater. BCAA’s help prevent muscle breakdown by keeping the supply needed by working muscles in check. This is important since they fuel muscles directly for energy, while also triggering lean muscle building and the burning of fat. 3-5g of BCAA’s can be taken before and after workouts.

Reference:

http://www.livestrong.com/article/267249-amino-acid-supplements-for-women/