Movement and Intrinsic Motivation

Author: Dr Joe Gaunt

The Reason Your Gym Membership Is Collecting Dust

Think about the colleague who talks about their Sunday morning cycling group with the kind of energy most people reserve for holidays. Or the friend who has not missed a weekly tennis session in three years, not because they are disciplined, but because missing it would genuinely disappoint them. Now think about the gym you joined in January, the running plan you started and abandoned, the fitness class you attended twice and quietly never returned to. The difference between those two experiences is not perseverance, character, or free time. It is something the research has been pointing to for decades - and that behaviour change practice has been painfully slow to act on.

What's going on?

Physical inactivity remains one of the most significant public health challenges globally, and the most commonly proposed solutions - structured programmes, fitness targets, health warnings - consistently fail to produce lasting change. Gym dropout rates are notoriously high, with the majority of new members reducing or ceasing attendance within the first three to six months (Rodrigues et al., 2018). The standard response is to conclude that people lack motivation. The more accurate conclusion is that most exercise prescriptions are designed around what people should do rather than what they are likely to sustain - and the difference is fundamental.

Why is this happening?

Self-Determination Theory, developed by psychologists Edward Deci and Richard Ryan, offers one of the most robust frameworks for understanding why people persist in or abandon behaviours. At its core, the theory distinguishes between two fundamentally different motivational states. Extrinsic motivation - exercising to lose weight, to meet a target, to avoid guilt, to comply with a doctor's advice - can initiate behaviour. It rarely sustains it. Research consistently shows that people who exercise primarily from external or guilt-driven pressure are more likely to experience negative affect during activity, more likely to relapse, and significantly less likely to continue beyond the short term (Teixeira et al., 2012).

Intrinsic motivation operates on an entirely different biological substrate. When a person engages in an activity because they find it genuinely enjoyable, interesting, or satisfying in itself, the brain responds differently. Neuroimaging studies show that intrinsically motivated behaviour activates the insular cortex and reward circuitry in ways that are qualitatively distinct from extrinsically driven behaviour, producing a state of absorption and sustained engagement that researchers associate with Csikszentmihalyi's concept of flow - the experience of being fully immersed in something for its own sake (Ryan & Deci, 2019). This is not a personality trait reserved for athletes. It is a motivational state available to anyone, provided they find the right vehicle for it.

A large-scale systematic review found that intrinsic motivation was the strongest predictor of long-term exercise adherence - more predictive than health knowledge, stated intention, or programme structure. Crucially, enjoyment itself, independent of fitness outcomes or weight change, was one of the most consistent predictors of whether people continued exercising at all, across age groups, fitness levels and activity types (Teixeira et al., 2012).

What can we do about it?

The shift required here is not motivational. It is investigative.

Most adults approach movement through the lens of their worst experiences of it - the PE lesson they dreaded, the gym induction they found alienating, the run they forced themselves through and hated. These experiences become the reference point from which future attempts at getting fit are made. The question worth asking is not "what exercise should I be doing?" but "what movement have I ever genuinely enjoyed, or might I enjoy if I tried it?"

This looks different for every person. Some find intrinsic motivation through skill acquisition - learning to climb, swim properly, play a sport, or dance - activities that connect movement to something cognitively engaging and mastery-driven. Research suggests that competence satisfaction, the sense of getting better at something, is one of the three core psychological needs that sustain autonomous motivation over time (Ryan & Deci, 2019). Others find it through social connection. The relatedness dimension of Self-Determination Theory identifies belonging to a group, team or community as a powerful independent driver of sustained participation - which is precisely why people who exercise with others show consistently higher long-term adherence than those exercising alone (Rodrigues et al., 2018).

The practical starting point is simple, but it requires patience: treat the search for an enjoyable activity as the actual work. Try things with no expectation of enjoying them immediately. Revisit activities you have not tried since childhood. Link movement to something else you value - music, nature, social connection, competition, learning. Keep going until you find something you would actually miss if you stopped. That is not the beginning of a fitness journey. That is the thing itself.

References:

Deci, E. L., & Ryan, R. M. (2000). The "what" and "why" of goal pursuits: Human needs and the self-determination of behavior. Psychological Inquiry, 11(4), 227-268. 

Rodrigues, F., Bento, T., Cid, L., Neiva, H. P., Teixeira, D., Vlachopoulos, S., Haerens, L., & Monteiro, D. (2018). Can interpersonal behaviour influence the persistence and adherence to physical exercise practice in adults? A systematic review. Frontiers in Psychology, 9, Article 2141. 

Ryan, R. M., & Deci, E. L. (2019). Brick by brick: The origins, development, and future of self-determination theory. Advances in Motivation Science, 6, 111-156. 

Teixeira, P. J., Carraça, E. V., Markland, D., Silva, M. N., & Ryan, R. M. (2012). Exercise, physical activity, and self-determination theory: A systematic review. International Journal of Behavioral Nutrition and Physical Activity, 9, Article 78.