Search Results - "Weydahl, A."

Heart rate response to a standardized walking exercise in the Arctic circumpolar region in morning vs. evening during the polar night and midnight sun by CALOGIURI, G, WEYDAHL, A, SOTHERN, R. B

“…Awareness of daytime and/or seasonal variation in performance and exercise efficiency can be important for athletes and coaches in order to suitably plan…”
Get full text

Geomagnetic activity influences the melatonin secretion at latitude 70° N by Weydahl, A., Sothern, R.B., Cornélissen, G., Wetterberg, L.

“…Factors other than light may affect variations in melatonin, including disturbances in the geomagnetic field. Such a possibility was tested in Alta, Norway,…”
Get full text

Graded response of heart rate variability, associated with an alteration of geomagnetic activity in a subarctic area by Oinuma, S., Kubo, Y., Otsuka, K., Yamanaka, T., Murakami, S., Matsuoka, O., Ohkawa, S., Cornélissen, G., Weydahl, A., Holmeslet, B., Hall, C., Halberg, F.

“…It is becoming recognized that geomagnetic activity may influence biological processes, including the incidence of various human diseases. There is evidence…”
Get full text

Non-linear relation of heart rate variability during exercise recovery with local geomagnetic activity by Weydahl, A., Sothern, R.B., Cornélissen, G.

“…Heart rate variability (HRV) during 30 minute's recovery from a 30-minute exercise was established for 6 healthy men 23-30 years old. The exercise-recovery…”
Get full text

Covariance of daylight, sport participation and sleep patterns by Weydahl, A

Get more information

Sex Differences in the Effect of Exercise upon Sleep by Weydahl, Andi

“…A survey in a high school in the city of Tromsø in the spring of 1988 was designed to examine the characteristics of sleep and factors promoting and disturbing…”
Get full text

Sleep-Quality among Girls with Different Involvement in Competitive Sports during Fall in the Arctic Circle by Weydahl, Andi

“…Eight high-school girls participating in competitive sports and six non-participating girls living north of the polar circle recorded their sleep once a week…”
Get full text

Time-dependent glycemic response to exercise in winter and spring in the subarctic by Weydahl, A, Balto, P A, Einvik, E H, Mikkelsen, B R, Sothern, R B

“…Twenty healthy athletes exercised for 30 min at four different times (beginning at 1130 and 1630) in December (darkness period) and in April (18 h of…”
Get more information

Non-photic solar associations of heart rate variability and myocardial infarction by Cornélissen, Germaine, Halberg, Franz, Breus, Tamara, Syutkina, Elena V., Baevsky, Roman, Weydahl, Andi, Watanabe, Yoshihiko, Otsuka, Kuniaki, Siegelova, Jarmila, Fiser, Bohumil, Bakken, Earl E.

“…Alignment of serial epidemiological, physiological, including electrocardiographic data with variations in galactic cosmic rays, geomagnetic activity, and…”
Get full text

Evening melatonin in January after changes in hours of habitual exercise during fall among youths living in the subarctic by Weydahl, A

“…Secretion of the hormone melatonin shows a circadian rhythm and is inhibited by light. Light therapy with phase shifting of the melatonin rhythm has been used…”
Get more information

Geomagnetic activity influences the melatonin secretion at latitude 70 degrees N by Weydahl, A, Sothern, R B, Cornélissen, G, Wetterberg, L

“…Factors other than light may affect variations in melatonin, including disturbances in the geomagnetic field. Such a possibility was tested in Alta, Norway,…”
Get full text

Daily spot-checking versus chronobiologic monitoring of human differential surface (rib versus breast) temperature by Weydahl, A, Halberg, F

“…A healthy, physically active woman, 35 years of age, living in Minneapolis, automatically monitored her skin surface temperature (ST) 3 inches above each…”
Get more information

Circadian heart rate and blood pressure variability considered for research and patient care by Singh, Ram B, Cornélissen, Germaine, Weydahl, Andi, Schwartzkopff, Othild, Katinas, George, Otsuka, Kuniaki, Watanabe, Yoshihiko, Yano, Shoki, Mori, Hideki, Ichimaru, Yuhei, Mitsutake, Gen, Pella, Daniel, Fanghong, Lu, Zhao, Ziyan, Rao, Reema S, Gvozdjakova, Anna, Halberg, Franz

“…Objectives: To review mechanisms of circadian variations in heart rate variability (HRV) and blood pressure variability (BPV) and mortality and morbidity due…”
Get full text

Dynamic analysis of heart rate variability from 7-day Holter recordings associated with geomagnetic activity in subarctic area by Otsuka, K., Ichimaru, Y., Cornelissen, G., Weydahl, A., Holmeslet, B., Schwartzkopff, O., Halberg, F.

“…Any influence of the natural variation in the geomagnetic field on human health has become an increasingly pertinent question in view of associations in space…”
Get full text

Geomagnetic disturbance associated with decrease in heart rate variability in a subarctic area by Otsuka, K., Cornélissen, G., Weydahl, A., Holmeslet, B., Hansen, T.L., Shinagawa, M., Kubo, Y., Nishimura, Y., Omori, K., Yano, S., Halberg, F.

“…Background. Physical environmental variables, such as the natural variation in the geomagnetic field in and around the earth, influence biological processes…”
Get full text

Sleep Quality Among Girls With Different Involvement In Competitive Sports During Fall In The Artic Circle by Weydahl, A

Get full text

Can nutrition influence circadian rhythm and heart rate variability? by Singh, R.B., Weydahl, A., Otsuka, K., Watanabe, Y., Yano, S., Mori, H., Ichimaru, Y., Mitsutake, G., Sato, Y., Fanghong, L., Zhao, Z.-Y., Kartik, C., Gvozdjakova, A.

“…Recent studies indicate that there is an interaction between biorhythms, the biological clock and triggers, which may be important in the pathogenesis of…”
Get full text

Geomagnetic disturbance associated with decrease in heart rate variability in a subarctic area by OTSUKA, K, CORNELISSEN, G, HALBERG, F, WEYDAHL, A, HOLMESLET, B, HANSEN, T. L, SHINAGAWA, M, KUBO, Y, NISHIMURA, Y, OMORI, K, YANO, S

“…Physical environmental variables, such as the natural variation in the geomagnetic field in and around the earth, influence biological processes and human…”
Get full text

Alternating light-darkness-influenced human electrocardiographic magnetoreception in association with geomagnetic pulsations by Otsuka, K., Oinuma, S., Cornélissen, G., Weydahl, A., Ichimaru, Y., Kobayashi, M., Yano, S., Holmeslet, B., Hansen, T.L., Mitsutake, G., Engebretson, M.J., Schwartzkopff, O., Halberg, F.

“…Geomagnetic variations of partly interplanetary origin, with cyclic signatures in human affairs and pathology include the incidence of various diseases,…”
Get full text

Alternating light-darkness-influenced human electrocardiographic magnetoreception in association with geomagnetic pulsations by OTSUKA, K, OINUMA, S, ENGEBRETSON, M. J, SCHWARTZKOPFF, O, HALBERG, F, CORNELISSEN, G, WEYDAHL, A, ICHIMARU, Y, KOBAYASHI, M, YANO, S, HOLMESLET, B, HANSEN, T. L, MITSUTAKE, G

“…Geomagnetic variations of partly interplanetary origin, with cyclic signatures in human affairs and pathology include the incidence of various diseases,…”
Get full text