Biorhythms and Highway Crashes

Biorhythms: Their utility for predicting postoperative recuperative time, death, and athletic performance.

“…To do this, first all seven possible combinations of critical and noncritical days for the three biorhythms were identified (no critical days, critical on physical but not on emotional or intellectual, critical on physical and emotional but not on intellectual, etc.). Then the number of deaths that would be expected by chance among people having each of those combinations of critical and noncritical days was computed (Shaffer et al, 1978). And finally, using chi-square analyses, the number of deaths that were expected by chance among people having those combinations of critical and noncritical days was compared to the actual number of deaths among people having those combinations of critical and noncritical days.…”

Identify patterns of individual dynamics of competitive performance of athletes as a basis for predicting results (qualified basketball players for example)

“…For example, for an athlete, 1 period of fluctuations in game performance is 28 days. Based on the literature data on the psycho-physiological features of people with different biorhythm periods [17,18,19], it can be concluded that this athlete's general condition, and, consequently, his competitive performance, depends on the physical biorhythm [20,21,22]. As shown by our previous studies [15], for many qualified basketball players, the dynamics of game performance is determined by the psychological state, but player 1 is distinguished by the fact that its game performance determines precisely the physical state.…”

The effect of biological rhythms and personality traits on the incidence of unsafe behaviors among bus drivers in Shiraz, Iran

“… 29 32 There is also inconsistency with some other studies. 33 , 34 For instance, according to Reinhold's findings, only 2.2% of the events were likely to occur on normal days while 97.8% had a potential to be seen on the critical days. 32 Bordbar also indicated that biorhythm cycles and critical days had been considered as effective factors on the severity of accidents.…”