Many researchers have acknowledged that activity pacing is a poorly defined construct and the various sources of conceptual confusion relating to the term activity pacing have been documented.1, 11, 13, 11, 15 This has cast doubt about the validity of current activity pacing self-report measures.2, 5 In response to this, a number of research groups have recently attempted to define activity pacing through varying methodologies and have worked toward developing tools to assess activity pacing.5, 6, 12, 15 Although this may seem like a positive step toward advancement in the field, each research group has arrived at different conclusions adding to the level of uncertainty about the meaning of the term activity pacing.