The Internet will soon became a fertile ground for cross-sectional research (Lesgold, 1991; Szabo & Frenkl, 1996). In this inquiry, the active readers of five activity news-groups, aerobic exercise, weight training, cross-training, fencing, and bowling, were studied. The relationships between negative affect at times of constrained inactivity, trait-anxiety, commitment, and reasons for starting and maintaining the adopted activities were examined in 130 volunteers. The results revealed that bowlers reported less negative affect when they could not bowl than subjects in the other groups. Respondents who started their activity for health reasons evinced lower trait-anxiety and more intense deprivation feelings than those who started for other reasons. Subjects who maintained their activity for health reasons displayed lesser commitment and trait-anxiety than subjects who continued their activity for other reasons. The internal consistencies of the adopted questionnaires were very good, suggesting that the data collection method did not shatter their reliability. These findings provide support for the feasibility of low-budget and time-efficient exploratory studies on the Internet.