In addition, support from friends is usually voluntary, sustained only by feelings of affection, mutuality, and love (Yeung and Fung 2007), but not motivated by moral obligations (typical of family ties, Merz et al. 2009).
Research on the acceptability of contraception, perhaps the closest comparator for biomedical-based interventions in sexual health, considers acceptability to be the voluntary, sustained use of a product in the context of alternatives [ 34].
The latter issue has been referred to as acceptability, defined as "the voluntary sustained use of a method in the context of alternatives" (p. 47) [ 27].
SEMG data were recorded from the masseter, sternocleidomastoid, and upper trapezius muscles during maximum voluntary contraction and sustained voluntary isometric clenching, the neck flexion endurance test and shoulder elevation for 30 s.
The experiment consisted of two phases: (1) the MVC procedure to recruit each of the examined muscles and (2) five trials designed to determine pelvic floor muscle activity, that is, a 10-second baseline activity, 5 repeated short (quick flick) contractions, 5 repetitions of 10-second voluntary contractions, sustained 60-second contraction, and 10-second relaxation.
Based on our findings this informal approach may 'fit' better with the way some fathers wish to manage their caring roles within their families, but it has yet to be seen if informal and voluntary support can be sustained over long periods of time.
Since I won't be running any marathons today (I prefer my sustained voluntary pain from a bicycle seat), I have time to consider some of the paradoxes and complications of all this.
Like many of the Forty-Eighters, Schurz marveled at the bustle of American life, the voluntary philanthropy that sustained the arts and education, and the almost total absence of governmental coercion.
Why are some bosses able to secure effort while others fail to do so and, even worse, occasionally suffer from high voluntary turnover and sustained workplace shirking?
In the present study, we investigated whether voluntary daily running, sustained over several months, might improve cognition and motor function and modify the brain levels of selected proteins (SOD1, DYRK1A, MAP2, APP and synaptophysin) in Ts65Dn mice, a mouse model for Down syndrome (DS).
Van Beekvelt et al. [ 21] studied three humans with myotonia and defined the warming-up phenomenon as the force recovery phase after initial paresis during a sustained voluntary contraction.
