Munguva yekudonha, mazuva akapfupika kana achienzaniswa nezhizha. Vazhinji vanhu vanochinja pasina kunetseka nekuti kunosviba pamberi pa6 masikati, asi vamwe, avo vanowanzo kuve vane hanya, vanotambura kushushikana uye kushungurudzika nekuda kwekudzikira kwemaawa ezuva.
Izvi zvinokonzerwa nedambudziko rinozivikanwa seSAD. (mwaka unokanganisa kusagadzikana). Mwaka inoshanduka, uye ihwohwo nechiedza chezuva, icho chinokanganisa mutenderedzwa we circadian, wachi yemukati yemuviri wemunhu iyo inobatanidzwa mukugadzirwa kwehomoni, pamwe nemafungu ehuropi. Izvi zvinokonzeresa vanhu vane hukasha kuona shanduko mumanzwiro avo nekuti iyo yepakati tsinga system inogadzira mhinduro yehasha yakafanana neyakagadzirwa nejet lag.
Kurarama mazuva mapfupi uye mapfupi, panguva yatinosiya basa uye kwasviba zvachose, zviri nyore kana tikaziva kuti kupera kwaZvita, mazuva achatanga kureba zvakare. Kufunga kwepfungwa kunobatsira, asi dzimwe nguva hakuna kukwana, uye mune izvo zviitiko tinogona kuedza Rongedza zvakare chirongwa kuti uwane zuva rakawanda sezvinobvira kana kushanyira kune yakajeka chena mwenje kurapa.
Vitamin D zvinowedzerazve mumwe mushonga weSAD nekuti zvirwere zvakawanda, kunyanya kushushikana, zvinosangana nekushomeka kwechikafu ichi. Usazeze kubvunza chiremba wako nezvenyaya iyi, kunyanya kana iwe wakasangana nemamiriro ekudzikira nekupinda kwematsutso. Nekudaro, iwe unogona zvakare kuyedza mazuva mashoma uri wega kuti uone kana muviri wako uchiteerera zvakanaka kune iyo yakawedzera vitamini D-yakapfuma chikafu mune chikafu, Senge cod cod mafuta, salmon, tuna, mukaka, yogati, mazai, uye zviyo zvakasimbiswa ne vitamini D.