As we age, our hearts beat more slowly and pump less blood. Our lung capacity also decreases. These changes result in decreased maximal oxygen consumption, which causes less oxygen to reach muscles. Oxygen is the life fuel for muscles; without it, they simply cannot work. The decrease in muscle oxygen consumption is one of the main reasons why we slow down, grow weak and lose stamina as we age. Without speed, strength and stamina, we cannot do the basic activities of daily living that allow us to enjoy life, maintain health and remain independent.
The next time your client complains that lactic-acid buildup is keeping her from doing her best, take it with a grain of salt. According to the August 20 issue of Science (2004; 305 , 1112–13), lactic acid just may be “the latest performance-enhancing drug.”
This assessment was based on a study published in the same issue of Science (pp. 1144...
Have you ever wondered if the effects of strength training differ between men and women, and among people of various races? Researchers in the School of Public Health at the University of Maryland sought to determine whether specific groups benefited more from strength training. The findings, printed in Medicine & Science in Sports & Exercise (2008; 40 , 669–76)...
While free weights and machines can
certainly make you stronger, don’t dismiss the effectiveness of exercises that
use only your own body weight. As you master your own weight, you will not only
look better; you will also learn how to train three-dimensional movement,
acquire a greater kinesthetic awareness and become empowered as you perform
tasks with your body. M...
Muscle fatigue is a
multifaceted phenomenon resulting from a combination of impairments throughout
the human neuromuscular system (Hicks, Kent-Braun & Ditor 2001; Russ et al.
2008). The definition of muscle fatigue has been modified throughout the years
as research has brought forth more understanding of the components contributing
The goal of many researchers, strength
and conditioning professionals and personal trainers is to enhance the acute
and chronic effects of resistance training on a person’s overall athletic
performance. To that end, many resistance training methods, strategies and
ergogenic aids have been investigated. Some of the underlying mech...
Have you ever wondered if there really is a difference between fixed
and freeform resistance equipment when it comes to improving strength? Data
collected for the January issue of the National Strength and Conditioning Association’s
Journal of Strength and
Conditioning Research (2008; 22 , 75–81) compared the two types
an article in the January 15 issue of Arthritis & Rheumatism (2008; 59 , 84–91), neck pain is
now the second most common musculoskeletal disorder after back pain. Experts
claim that “more than half of all adults have experienced neck pain during the