Sometimes it can be hard to tell the difference between allergies and the common cold. There are more than a hundred strains of cold viruses. Each tends to become widespread at certain times of the year, which is why you may mistake a cold for a seasonal allergy.
Q: How often should I work out? A: The amount of exercise you need depends on the type of lifestyle you want to maintain. For beginners, most experts recommend at least 20 minutes of exercise three times a week. These 20 minutes can be a combination of four 5-minute sessions of exercise, two 10-minute sessions or 20 continuous minutes. Just doing something is better than no exercise at all.
The results of this study indicate that training only one or two days per week is effective for increasing muscle strength. However, because the one-day-per-week exercisers endured such a demanding workout (12 sets of bench presses), this training protocol was not very practical.