excuses, 13–14, 50
exercise, 225–7;
acute, 228, 236;
addiction to, 240, 241
(see also exercise dependence);
adverse health effects, 238–42
(see also exercise dependence; overtraining);
aerobic, 229, 281;
anaerobic, 229, 281;
attrition, 250–1;
beneficial health effects, 227, 231–8;
chronic, 228, 236;
cognitive functioning, and, 236;
definition, 283;
depression, and, 234–5;
drop out rates, 250–1;
endorphin hypothesis, 235;
excessive, 240;
Green Gym, 230;
meaning of, 228–30;
mood states, and, 234;
motivation, 38;
outdoor, 230;
physical activity, distinguished from, 228;
physical benefits, 227, 231–3;
physical fitness, 230–1, 237–8;
practical tips, 251;
psychological benefits, 233–6;
psychological effects, 227–8;
research evaluation, 236–8;
self-esteem, and, 236;
stretching before exercising, 260–1;
task orientation, and, 237;
see also exercise behaviour;
exercise psychology
exercise behaviour:
barriers to taking up exercise, 243–4;
dropping out, 250–1;
intention, 245–6;
planned behaviour, 246;
reasoned action, 244–6;
reasons for taking up exercise, 243;
research on, 243;
theories of, 244–51;
Transtheoretical Model (TTM), 246–50
exercise dependence, 226, 238, 239–42;
addiction, whether, 241;
definition, 283;
diagnostic criteria, 240;
effects of, 241–2;
research findings, 242;
tolerance criterion, 240, 241;
Subject index 331