In lucid dreams the dreamer is aware of dreaming and often able to influence the ongoing dream content. Lucid dreaming is a learnable skill and a variety of techniques is suggested for lucid dreaming induction. This systematic review evaluated the evidence for the effectiveness of induction techniques. A comprehensive literature search was carried out in biomedical databases and specific resources. Thirty-five studies were included in the analysis (11 sleep laboratory and 24 field studies), of which 26 employed cognitive techniques, 11 external stimulation and one drug application. The methodological quality of the included studies was relatively low. None of the induction techniques were verified to induce lucid dreams reliably and consistently, although some of them look promising. On the basis of the reviewed studies, a taxonomy of lucid dream induction methods is presented. Several methodological issues pertaining to both studies reviewed and lucid dream induction research in general are discussed.

In a lucid dream the dreamer is aware of the dream state and can carry out actions deliberately. Lucid dream practice (LDP) is the rehearsal of movements during lucid dreams and constitutes a specific form of mental practice. Previous studies demonstrated that LDP can enhance physical performance. To gain deeper insight into LDP on a qualitative level, sixteen semi-structured interviews were conducted with lucid dreamers from different countries. Inductive content analysis revealed that many different sports and movements can be practiced in lucid dreams. LDP experiences were very realistic, including kinesthetic perception. Required equipment or sparring partners usually were available or could be created and adjusted by the athletes. Thirteen interviewees (81.3%) reported positive effects of LDP. In particular, 10 participants reported to have improved their physical performance through LDP, confirming findings of previous studies. Other positive effects were, for example, strengthened confidence, insights for physical practice (PP), improved flexibility, and positive emotions. The results also demonstrate the special possibilities of LDP like deliberate manipulation of practice conditions, speed, and perspective. Furthermore, problems occurring during LDP are described and how they can be dealt with. Based on the results, practical advice for interested athletes is provided. In conclusion, the present study demonstrates the great potential of LDP for sports practice. LDP could also be applied in other areas that involve motor learning, like rehabilitation, music, or surgery. The present study complements previous LDP findings and provides input and new ideas for future LDP studies. Furthermore, it is an important contribution to general MP research. Findings from LDP research–a small but growing field–should be incorporated into conceptual discussions on MP. Also, by extending LDP research, athletes and coaches could become more aware of this unique and effective method and could start to integrate it into sports practice.

In a lucid dream, the dreamer is aware of the dream state and can deliberately practice motor skills. Two field studies indicated that lucid dream practice can improve waking performance in simple motor tasks. The present pilot study investigated the effect of lucid dream practice in a controlled sleep laboratory setting, using a pre-post design with dart throwing in the evening and morning. The experimental group practiced darts in lucid dreams. Because some participants were distracted during lucid dream practice, the group was divided into lucid dreamers with few (n = 4) and many distractions (n = 5). Change of performance was compared to a physical practice group (n = 9) and a control group (n = 9), showing a significant interaction (P = .013, η = .368). Only the lucid dreamers with few distractions improved (18%) significantly over time (P = .005, d = 3.84). Even though these results have to be considered preliminary, the present study indicates that lucid dream practice can be an effective tool in sports practice if lucid dreamers find ways to minimise distractions during lucid dream practice. Moreover, the study emphasises the necessity to investigate lucid dream practice experiences on a qualitative level.