The influence of winter and summer seasons on physical fitness in aged population

Hematological detraining-related changes among elderly individuals with high blood pressure

AIM

The aim of the present study was to compare the effects of detraining on physical performance, blood pressure, biologic and anthropometric variables of hypertensive elderly individuals, grouped by two levels of previous physical activity.

METHODS

A total of 87 elderly individuals (70 to 93 years old) with systolic/diastolic blood pressure levels above 120/80 mmHg who participated during 18 non-consecutive months in 2 years in physical exercise programs offered in northern Portugal communities were included in the study. Tests were performed before and after three months of no exercise. Attendance to the exercise sessions, hematological markers, cardiorespiratory function, and anthropometric variables were assessed. The results were analyzed according to the fulfillment of the WHO recommendations on moderate physical activity (at least 150 minutes/week).

RESULTS

Weight, total cholesterol, and glucose were influenced by the amount of physical activity performed previously to the detraining period. After the detraining period, the total cholesterol, glucose, insulin, and weight had significant differences influenced by the amount of physical activity previously performed (p<0.05).

CONCLUSIONS

The number of minutes per week of aerobic and resistance exercise training over 18 non-consecutive months was not a significant determinant factor in the development of hypertension during the three months of detraining.

Impact of a five-month detraining period on the functional fitness and physical activity levels on active older people

PURPOSE

This research was aimed at evaluating the effects of a five-month detraining period on the functional fitness level of a group of non-institutionalized and active older adults after taking part in a multi-component training program. A secondary aim was to determine how usual physical activity (PA) levels vary due to cessation of the program.

METHODS

We tested sixty-five older people (mean age: 77.1 ± 6.2; 83% women) during the final week of an 8-month multi-component training program and during the first week after its resumption (five months later). We used the senior fitness test and the Minnesota Questionnaire to assess their functional fitness and their PA levels respectively.

RESULTS

We observed a significant worsening of lower-limb strength (p = 0.008), shoulder range of motion (p = 0.004), and dynamic balance (p < 0.001) once the detraining period was completed. There was a slight downward trend in the remaining functional fitness dimensions, and there were significant differences when comparing the amount of PA estimated at pre-detraining and post-detraining (5155 ± 2258 vs 3937 ± 2087 MET-min·wk-1; p < 0.001). Older adults classified as very active showed a non-significant trend to smaller decreases in functional fitness once the detraining period was over, in comparison with those considered active.

CONCLUSIONS

Active older people who regularly participated in a multicomponent training program showed a significant reduction in their strength, range of motion, and dynamic balance levels after a five-month detraining period. Self-reported PA decreased significantly during this time frame. Effective strategies are needed to increase PA levels in older people when systematic training programs are temporarily interrupted.