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HIT exercise lowers cognitive decline in older women

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From this study, Effects of aerobic exercise on mild cognitive impairment: a controlled trial this quote:

“Six months of high-intensity aerobic exercise had sex-specific effects on cognition… aerobic exercise improved performance on multiple tests of executive function, increased glucose disposal during the metabolic clamp, and reduced fasting plasma levels of insulin, cortisol, and brain-derived neurotrophic factor.”

The sixteen men in the study did not achieve the same positive cognitive results. They postulated that the difference was possibly because the body's use of and production of cortisol, insulin, and glucose differed in women and men. Regardless, the long list of positive changes resulting for high intensity exercise makes it worth the investment of one’s time.


Studys Shows That HIT Exercise Lowers Blood Pressure

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From this study, High-intensity interval training and hypertension: maximizing the benefits of exercise?:

"Several studies have shown that high-intensity interval training (HIT), which consists of several bouts of high-intensity exercise (~85% to 95% of HRMAX and/or VO2MAX lasting 1 to 4 min interspersed with intervals of rest or active recovery, is superior to Continuous moderate-intensity exercise training CMT for improving cardiorespiratory fitness, endothelial function and its markers, insulin sensitivity, markers of sympathetic activity and arterial stiffness in hypertensive and normotensive at high familial risk for hypertension subjects. This compelling evidence suggesting larger beneficial effects of HIT for several factors involved in the pathophysiology of hypertension raises the hypothesis that HIT may be more effective for preventing and controlling hypertension."


How Much Of Difference Can Three Minutes Of Exercise A Week Make?

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How much difference can three minutes of exercise a week make? it turns out quite a lot. How can that be? From this article, Can three minutes of exercise a week help make you fit?, comes this quote:

"part of the explanation is (probably) that HIT uses far more of our muscle tissue than classic aerobic exercise.

When you do HIT, you are using not just the leg muscles, but also the upper body including arms and shoulders, so that 80% of the body's muscle cells are activated, compared to 20-40% for walking or moderate intensity jogging or cycling.

Active exercise also seems to be needed to break down the body's stores of glucose, deposited in your muscles as a substance called glycogen. Smash up these glycogen stores and you create room for more glucose to be sucked out of the blood and stored."


High-intensity intermittent exercise effectively burns fat

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From the Journal of Obesity from this study, High-Intensity Intermittent Exercise and Fat Loss comes this quote:

“The effect of regular aerobic exercise on body fat is negligible; however, other forms of exercise may have a greater impact on body composition. For example, emerging research examining high-intensity intermittent exercise (HIIE) indicates that it may be more effective at reducing subcutaneous and abdominal body fat than other types of exercise.”

And this quote:

“Regular HIIE produces significant increases in aerobic and anaerobic fitness and brings about significant skeletal muscle adaptations that are oxidative and glycolytic in nature. HIIE appears to have a dramatic acute and chronic effect on insulin sensitivity.”


Long distance running lowers testosterone; sprint training increases it

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From This study, Effect of altered reproductive function and lowered testosterone levels on bone density in male endurance athletes: "Relatively short duration exercise bouts at maximum or near maximum intensity appear to increase serum testosterone levels, with measurable changes evident within minutes. However, with prolonged acute submaximal exercise bouts of approximately two hours or longer, suppression of circulating testosterone is noted which may remain for several days. "


The benefits of human growth hormone and how to increase levels naturally

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According to the Mayo Clinic Human Growth Hormone (HGH) can:

  • Decrease body fat

  • Increase exercise capacity

  • Increase bone density

  • Increase muscle mass


HGH levels are higher when we are young and growing and decrease with age. Raising HGH naturally is a good thing for most people. How to do that? One study, The time course of the human growth hormone response to a 6 s and a 30 s cycle ergometer sprint looked at the different responses to sprinting six seconds versus 30 seconds on a stationary bike. They found that:

Metabolic responses were greater after the 30 s sprint than after the 6 s sprint. The highest measured mean serum hGH concentrations after the 30 s sprint were more than 450% greater than after the 6 s sprint.


High intensity interval training produces metabolic adaptations in far less time compared to traditional methods

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In a two week study ( Short-term sprint interval versus traditional endurance training: similar initial adaptations in human skeletal muscle and exercise performance) researchers compared changes produced by sprint-inteval training (SIT) versus high volume endurance training (ET). Total training time 2.5 hours for SIT and 10.5 hours for ET, and total training volume was 90% lower for SIT versus ET

From the study: Brief, intense exercise training may induce metabolic and performance adaptations comparable to traditional endurance training....Given the large difference in training volume, these data demonstrate that SIT is a time-efficient strategy to induce rapid adaptations in skeletal muscle and exercise performance that are comparable to ET in young active men.


Less time exercising more fat loss

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Exercises are performed in all sorts of ways. Expose your body to more work that it is used to handling, allow rest and recovery and the body will make a positive adaptation as a form of self protection. You can put in more time – do more reps, do more sets, run a little further, engage in whatever the activity is a little longer – and as long as you don’t overdo it the body will come back improved.

You can work a little harder – more weight on the bar, a steeper hill at the same pace, sprinting instead of jogging - and again as long as you don’t overdo it the body will come back improved. If you exercise in this way the workouts cannot be very long but they can be very effective. Just one benefit is fat loss.

From this study, High-Intensity Intermittent Exercise and Fat Loss this quote:


Fifteen Minutes Of Training In Two Weeks Remarkable Result

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After two weeks of exercise totaling 15 minutes, the result from this study, Extremely short duration high intensity interval training substantially improves insulin action in young healthy males:

Insulin sensitivity, as measured by the Cederholm index, was improved by 23% (P < 0.01), while aerobic cycling performance improved by ~6% (P < 0.01).

They concluded:

The efficacy of a high intensity exercise protocol, involving only ~250 kcal of work each week, to substantially improve insulin action in young sedentary subjects is remarkable.