when to lower the cardio and increase the strengthening

However, remember that muscle weighs more than fat.

A lb of muscle is heavier than a lb of fat?

Muscles is denser than fat, a given volume of muscle will be heavier than the same volume of fat.

Don't worry about "too much cardio burning muscle". Those effects are wildly overstated.

I've been reading up on here that too much cardio when there is nothing much left to lose, can cause the body to use up muscle gain to aid cardio causing muscle mass to decrease.

You would have to do a whole lot of steady-state aerobics (cardio is a misnomer) such as a marathon a week to have any concerns about losing muscle mass. That said, you should build your fitness training around anaerobics, not aerobics. You can get many more benefits by increasing lean muscle mass with high intensity anaerobics than you can from hours of aerobics.

Strength training is the only way to reach peak fitness. The reasoning is as follows: When you add muscle, you also force the organs and systems which support muscle to develop and become more robust and that includes everything from the heart to liver and kidneys to lungs and cardio-vascular system to the smallest capillary, etc. Here are just some of the benefits to anaerobic exercise.

• Stronger bones and increased bone mineral density (resistance to osteoporosis)
• Higher basal metabolic rate (50 cal/day/pound of muscle)
• More robust organic and systemic fitness
• Enhances immune system
• Increased resistance to injury
• Stronger tissues (connective, tendon, ligament, etc)
• Mechanical work easier to perform
• Reduced muscle loss due to aging from >35 years of age

Steady-state aerobics (cardio) does not offer all of these benefits, it increases the risk of injury, and produces greater wear and tear problems. I recommend reading this book --> http://www.bodybyscience.net/home.html/?page_id=18 for the whole story.

Here's an excerpt.

"The scientific literature is filled with data that strongly make the case that long distance runners are much more likely to develop cardio-vascular disease, atrial fibrillation, cancer, liver and gallbladder disorders, muscle damage, kidney dysfunction (renal abnormalities), acute microthrombosis in the vascular system, brain damage, spinal degeneration, and germ-cell cancers than are their less active counterparts."

Each assertion is footnoted. They're making the point that most people have "cardio" all wrong and don't really understand how to train to be fit.

Of course, your fitness program should be goal-oriented.

Here's an example of a good general strength training high intensity workout...one week's worth of training in about 12 minutes. ---> http://www.youtube.com/watch?v=FVhhbC51_3k&feature=related


Good luck and good health!!

♠

Steady-state aerobics (cardio) does not offer all of these benefits, it increases the risk of injury, and produces greater wear and tear problems. I recommend reading this book --> http://www.bodybyscience.net/home.html/?page_id=18 for the whole story.

Here's an excerpt.

"The scientific literature is filled with data that strongly make the case that long distance runners are much more likely to develop cardio-vascular disease, atrial fibrillation, cancer, liver and gallbladder disorders, muscle damage, kidney dysfunction (renal abnormalities), acute microthrombosis in the vascular system, brain damage, spinal degeneration, and germ-cell cancers than are their less active counterparts."
.
Here's an example of a good general strength training high intensity workout...one week's worth of training in about 12 minutes. ---> http://www.youtube.com/watch?v=FVhhbC51_3k&feature=related


Good luck and good health!!

♠

I may just order a copy of the book to satisfy my curiosity but I get a little worried about hyperbole like:

"By using a proper science-based approach to exercise you can be on your way to achieving the following in as little as 12 minutes a week:

Build muscle size and strength
Optimize cardiovascular health
Ramp up your metabolism
Lower cholesterol
Increase insulin sensitivity
Improve flexibility
Manage arthritis and chronic back pain
Build bone density
Reduce your risk for diabetes, cancer, heart attack, and more"

12 minutes a week?

While there have been a small number of cardiac arrests associated with marathons the literature clearly still supports endurance training as a significant factor in reducing the risk of heart attack and stroke, controlling blood pressure, maintaining healthy blood lipid levels etc.

http://online.wsj.com/article/SB10001424052970203436904577154894213494580.html

http://www.medscape.com/viewarticle/758295

Similarly the whole "you're going to wreck your knees" myth has been debunked too.

Should people strength train - you bet. Building and maintaining lean muscle mass is critical to optimal health and has been proven to have tremendous benefits for our aging population but should be part of a balanced approach to fitness which includes both aerobic and anaerobic exercise. "Get the results you want in 12 minutes a week!" - sorry, gotta call bull$**t on that one.