by LINDA MELONE | Livestrong.com
It happens to the best of us: You get injured, find yourself working around the clock or are otherwise forced to put exercise on the back burner for a while. And when the holidays roll around, you’re also provided an incentive to eat and drink and skip your workouts until January. But a day or two can easily stretch into weeks or even months, and you’re right back to square one. In technical terms, you’ve become “deconditioned.” In fact, 25 to 35 percent of adult exercisers quit working out within two to five months of starting, according to the American College of Sports Medicine (ACSM). How quickly your fitness level declines depends on several factors. Some may surprise you.
1. Cardiovascular Fitness Starts to Tank After One Week
2. You Lose Cardiovascular Fitness More Slowly If You’re a Seasoned Exerciser
3. Flexibility Loss Occurs Quickly
4. Strength Starts to Diminish After Two Weeks
5. You Lose Power Faster Than You Lose Strength
Power, defined as strength times distance over a period of time (e.g., how quickly you can hoist a weight or dash across the street to make the light), fades faster than strength, says physical therapist Danielle Weis. “Strength losses first occur due to a change in the nerve’s impulses to muscle fibers, shortly followed by actual muscle wasting.” During muscle wasting, protein breaks down at a faster rate and protein synthesis (building) drops. The time it takes for you to return to your original fitness level depends on the reason you stopped exercising in the first place — whether due to illness or simply lack of time.
Someone who’s healthy and takes a break from exercise loses muscle mass and cardiovascular fitness more slowly than a person who stops exercising due to an illness or injury. The latter will lose fitness levels twice as fast, says Dr. Brad Thomas. The stress of an illness or injury takes a greater toll on the body than simply taking a break when you’re healthy. Whether you’re an athlete or recreational exerciser, if you’ve taken a few weeks off from your routine, your level of deconditioning will be pretty low, says physical therapist Danielle Weis. “If you are recovering from a fracture, surgery or have been on bed rest, it can take up to and longer than 12 to 24 months to fully recover.”
If you’re planning to take time off from your workout routine, keep in mind that staying in shape isn’t an all-or-nothing proposition. In fact, you can maintain your fitness levels in a surprisingly small amount of time, says Dr. Brad Thomas. “In order to maintain both aerobic and strength levels, you need just 20 minutes of high-intensity interval training (HIIT) twice a week.” Thomas cautions that the work effort must be truly high-intensity, at between 80 and 90 percent of your maximum heart rate.
You lose strength and overall fitness twice as quickly as you age, says Dr. Brad Thomas. “It’s largely due to hormone levels. As we age, we have lower levels of human growth hormone (HGH), which makes it harder to recover.” We also lose our ability to handle stress and recover from the resulting stress hormones, such as cortisol. As we get older, this same mechanism results in greater fatigue after a workout. Older athletes take longer to recover from workouts in general, according to several studies, including a 2008 article published in the Journal of Aging and Physical Activity.
After a period of lying around, your nervous system loses its ability to fire up as it did before you took time off, says Irv Rubenstein, exercise physiologist and founder of STEPS, a science-based fitness facility in Nashville, Tennessee. That’s due to the fact that you lose the neural stimuli that enables you to lift heavy objects with the same amount of effort. “When you return to lifting, you may be able to lift the same weights, but you will be working above your normal capacity, which could put tissue at risk. It will take a greater effort to do what you used to do and will require more rest between sets and days in order to recover. ”A novice who’s taken time off during the holidays will need to start from scratch. The athlete or experienced lifter can start back to where they were in early November and give it a month to get back to speed.
reprinted from Livestrong.com
6. Fitness Levels Decline Faster When You’re Sick
7. Maintenance Is Easier Than You Think
8. Aging Affects Fitness Loss
9. It Takes Three Weeks to Gain Back One Week Off
reprinted from Livestrong.com