Smartwatches have become increasingly popular in recent years. Among other things, they are used for fitness tracking (e.g. jogging, swimming), navigation, health monitoring and controlling smartphone applications (e.g. music streaming). However, low-fidelity prototyping and interaction design for these comparatively small devices, which can be used in different movement conditions (e.g. standing, walking), poses challenges. This article presents setup and results of a low-fidelity smartwatch prototype study on non-touch interaction with 13 participants standing and walking on a treadmill. After reviewing more than 75 min of video material frame by frame resulting in 112.856 interaction states, results show a significant difference between the use of smartwatches while walking or standing and with regard to different target sizes that should be aimed at using a pointing gesture. The positioning of the target elements in 3 variants had no significant influence. Based on these results, study and design recommendations for non-touch smartwatch interaction are discussed.