Plants, nature, etc. will for sure make people feel better compared to sitting in front of a computer. They will not make you instantly stronger or weaker... I guarantee that no double-blind experiment will ever show such effects.
Well, not entirely. What you hold subtly affects your response to a push, and the effect can be dramatic. The pusher, with eyes closed, will notice the difference.
Plants, nature, etc. will for sure make people feel better compared to sitting in front of a computer. They will not make you instantly stronger or weaker... I guarantee that no double-blind experiment will ever show such effects.