To give a Trager session is predominantly effortless, relaxing and harmonizing. To receive a Trager session means to relax muscles, to reduce stress, to become softer, to become more stable for daily life by a stronger biorhythm. Mentastics lead to Hook Up within 62 % of the participants. This is measurable! To be an observer or a witness in a session means to get into high resonance. The effect of Trager sessions is well measurable with elderly people.