I agree with Colbert and Schoeller (2) that the main problem is the effectiveness of training intervention, but we have to take up the challenge about the effects of intensity in RT (resistance training) and about the joined effects of different kinds of endurance and resistance training. Recent public health recommendations have emphasized the value of moderate intensity aerobic exercise for improving cardiovascular health and reducing the risk of coronary heart disease (CHD) (6). However, reviews of training studies have found that the higher the aerobic exercise intensity, the greater the increase in aerobic fitness (8). Aerobic exercise of a more vigorous intensity elicits a greater increase in aerobic fitness than does moderate intensity exercise and in addition has greater cardioprotective benefits(8). On the other hands RT seems to be more effective on obesity, HbA(1c) levels and systolic blood pressure (7). Recently an increase amount of studies have investigated the effects of the combination of RT and E, also known as circuit training on some physiological variables. As example an article from Fatone and colleagues (3) shows that two weekly sessions of combined aerobic and resistance exercise were sufficient to provide beneficial effects in subjects with type 2 diabetes mellitus and metabolic syndrome. Last findings suggest that circuit training may be a successful tool for improving some risk factors in healthy and unhealthy people (3, 4). However, the effects of different resistance training intensities on selected cardiovascular disease risk factors remains unclear although there are some interesting data about HIT (high intensity-interval training) on metabolic adaptations (5). As a matter of fact resistance training include a lot of variables like speed of movement both in eccentric and concentric phase, number of set and repetitions, recovery, different kind of exercise, etc that make difficult to study this kind of training and could explain the contradictory results and guidelines indications (1). The challenge now is to pick up all the training variables to better understand the health effects of different kind of physical exercise.
Let's go to the circuit: joining together resistance and endurance training. Re: "Expending our physical activity (measurement) budget wisely" Colbert, et al., 111:(2) 606-607doi:10.1152/japplphysiol.00089.2011
PAOLI, ANTONIO
2011
Abstract
I agree with Colbert and Schoeller (2) that the main problem is the effectiveness of training intervention, but we have to take up the challenge about the effects of intensity in RT (resistance training) and about the joined effects of different kinds of endurance and resistance training. Recent public health recommendations have emphasized the value of moderate intensity aerobic exercise for improving cardiovascular health and reducing the risk of coronary heart disease (CHD) (6). However, reviews of training studies have found that the higher the aerobic exercise intensity, the greater the increase in aerobic fitness (8). Aerobic exercise of a more vigorous intensity elicits a greater increase in aerobic fitness than does moderate intensity exercise and in addition has greater cardioprotective benefits(8). On the other hands RT seems to be more effective on obesity, HbA(1c) levels and systolic blood pressure (7). Recently an increase amount of studies have investigated the effects of the combination of RT and E, also known as circuit training on some physiological variables. As example an article from Fatone and colleagues (3) shows that two weekly sessions of combined aerobic and resistance exercise were sufficient to provide beneficial effects in subjects with type 2 diabetes mellitus and metabolic syndrome. Last findings suggest that circuit training may be a successful tool for improving some risk factors in healthy and unhealthy people (3, 4). However, the effects of different resistance training intensities on selected cardiovascular disease risk factors remains unclear although there are some interesting data about HIT (high intensity-interval training) on metabolic adaptations (5). As a matter of fact resistance training include a lot of variables like speed of movement both in eccentric and concentric phase, number of set and repetitions, recovery, different kind of exercise, etc that make difficult to study this kind of training and could explain the contradictory results and guidelines indications (1). The challenge now is to pick up all the training variables to better understand the health effects of different kind of physical exercise.
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