HRV increases with an increase in mental effort because workload has a direct effect on vagal tone. On the other hand, mental workload level can be interpreted from electrocardiography (ECG) signals mainly by heart rate variability (HRV) component. Engagement index is correlated with workload level and gives a quantitative assessment of EEG index for workload. Since gamma energy increases when a person gets engaged in a higher level of mental task or there is a voluntary allocation of attention, it is quite evident that there is an increase when the person is involved in a switching task. HWL) is associated with a characteristic pattern of electroencephalographic (EEG) activity: increased power in the beta bandwidth, increased theta activity at frontal sites, and suppression of alpha activity. MATB-II, the task designed for assessing the multitasking attributes, was used for workload assessment at two levels: low workload (LWL) and high workload (HWL). This is a day-to-day phenomena so the productivity can be rigorously enhanced by practicing SKY on a daily basis. As the levels of both psychological and physiological stress are tuned up and down, a non-linear effect on workload is evident. SKY is a practice of wellness which reduces stress, produces relaxation, and increases sensitivity in sensory transmission, leading to an increase in attention and vigilance. Sudarshan kriya is a Sanskrit word which literally means ‘proper vision by purifying action.’ It is an advanced form of rhythmic, cyclic breathing with slow, medium, and fast cycles. SKY is a rhythmic breathing activity consisting of the five stages i.e., Ujjayi, Bhastrika, Om, Sudarshan kriya, and Yoga Nindra. SKY had an effect on stress regulation which in turn enhanced their WL tolerance capacity for a particular multitask activity. In addition to this sympathovagal balance index also decreased in experimental group which indicated reduction in stress. Another astute observation included a considerable increase and decrease in the alpha and beta energies and root mean square of the EEG signal for the experimental group and control group, respectively. It was observed that subjective score of workload (WL) was significantly reduced in the experimental group and performance of the subject increased in terms of task performance. Pre- and post-meditation data were acquired from both groups over a period of 30 and 90 days. The experimental group was provided with an intervention of SKY for a duration of 30 min everyday.
Both the groups had no prior experience of SKY. Subjects were randomly assigned to two groups of ‘control’ and ‘experimental.’ Their objective scores were collected from the experiment based on NASA’s multi-attribute task battery II and was utilized for workload assessment. EEG and ECG recordings were taken from a total of twenty-five subjects who had volunteered for the experiment.
It builds on to quantitatively answer if SKY will increase workload tolerance for divided attention tasks in the people sank in it. The objective of the present work is to verify the effect of meditation in optimizing task efficiency and regulating stress.
Sudarshan Kriya Yoga (SKY) is a type of rhythmic breathing activity, trivially a form of Pranayama that stimulates physical, mental, emotional, and social well-being.
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