This program isn’t just for the true beginner who has never touched a weight before; it’s also suitable for anyone who has taken an extended leave of absence from training. How long has it been since you went to the gym regularly? Six months? A year? Five years? No worries: The following routines will get you back on track in—you guessed it—just four short weeks. Let’s get to work.
Although there have been hundreds of studies on physical exercise and the immune system, there is little direct evidence on its connection to illness. Epidemiological evidence suggests that moderate exercise has a beneficial effect on the human immune system; an effect which is modeled in a J curve. Moderate exercise has been associated with a 29% decreased incidence of upper respiratory tract infections (URTI), but studies of marathon runners found that their prolonged high-intensity exercise was associated with an increased risk of infection occurrence. However, another study did not find the effect. Immune cell functions are impaired following acute sessions of prolonged, high-intensity exercise, and some studies have found that athletes are at a higher risk for infections. Studies have shown that strenuous stress for long durations, such as training for a marathon, can suppress the immune system by decreasing the concentration of lymphocytes.[26] The immune systems of athletes and nonathletes are generally similar. Athletes may have slightly elevated natural killer cell count and cytolytic action, but these are unlikely to be clinically significant.[27]

(2) Active Phase (between 60% and 84% HRR). Continuous dynamic and interval training mode exercise involving large muscle activities with an increasing level of difficulty and intensity. Subjects began with a short walk, alternated with various step exercises (e.g., both side and forward-backward step up and down on the platform, with alternate footsteps). Then, they went on performing alternate upper-limb lifts (while keeping inferior limbs flexed) and lower limb flexions and extensions (knee lifts, both side and forward-backward leg lifts, and leg curls), as a sort of brief and easy sequence to be repeated for a fixed time. Integrated multiple plane exercises for upper and lower limbs using elastic resistances (Xertube®) completed the last part of the Active Phase. To reach the goal of gradually augmenting the intensity of the program, the coach continuously checked the HRR level of subjects who were progressively increasing the duration and the number of exercises. The resistance of the elastic bands was also increased by one level (from very light to medium) every 4 weeks.

Thus, little is known about the effects of monitored vigorous exercise in elderly people. While significant benefits for basic motor tasks (such as balance and gait) can be achieved through different kinds of physical activity (i.e., stretching exercises, treadmill, Pilates, and strength and balance training), no conclusive relationship has been proven between its intensity and such improvements. Recently, Pau et al. [14] reported that spatiotemporal gait parameters and sit-to-stand performance significantly improve through vigorous (but not light) exercises, thus suggesting that higher levels of intensity might be more suitable in generally improving static and dynamic daily motor tasks.