Sauyi: HMB Da Ingantaccen Ayyukan Cardio
Beta‑hydroxy‑beta‑methylbutyrate (HMB) ya shafe shekaru yana nan a kasuwar kari a matsayin “ƙara ƙarfi”. Sai dai wani bincike da aka wallafa a 2026 a Journal of the International Society of Sports Nutrition (Durkalec‑Michalski et al.) ya nuna cewa fa'idarsa mafi muhimmanci na iya zama a bangaren numfashi (aerobic). A cikin wani gwaji mai ƙwarewa, maza da suka sha adadin HMB da aka daidaita da nauyinsu yayin yin horon motsa jiki mai ƙarfi (HIFT) sun nuna ci gaba a cikin alamomin cardio fiye da waɗanda suka karɓi placebo. A gefe guda, ƙarfafa ƙafafu ta hanyar gwajin isometric ba ta samu wani bambanci ba.
Yadda Aka Gudanar da Binciken
An zaɓi matasa maza 90, daga ciki 53 suna da horo (shekaru 29 a matsakaici, nauyin ƙarfin jiki (FFM) kusan 71 kg) da 37 ba su da horo (shekaru 32 a matsakaici, FFM kusan 68 kg). Kowane mahalarta ya wuce matakai biyu na makonni uku‑ukuwa.
- Mataki na 1 (SUP): HMB ko placebo tare da horon da suka saba (rukunin masu horo) ko tare da rayuwar yau da kullum (rukunin ba masu horo).
- Mataki na 2 (SUP + EX): HMB ko placebo tare da zaman HIFT guda biyu a mako.
Karin da aka ba da shi ruwa ne na HMB free‑acid da ke ƙunshe da 90 mg a kowanne kilogram na FFM a rana. An auna alamomin a matakin farawa da a ƙarshen kowane mataki. An yi amfani da gwajin keke mai ƙara ƙarfi don auna VO₂max, anaerobic threshold (AT), da respiratory compensation point (RCP), yayin da aka yi gwajin maximum voluntary isometric contraction (MVIC) don auna ƙarfi a ƙafafu.
Abubuwan Da Suka Inganta
A cikin maza masu horo, rukunin HMB ya fi placebo a canjin daga matakin farko zuwa ƙarshen matakin HIFT a:
- VO₂max (p = 0.024)
- Lokacin zuwa AT, VO₂ a AT, ƙarfin wuta a AT, da saurin zuciya a AT
- Lokacin zuwa RCP, VO₂ a RCP, da ƙarfin wuta a RCP
Yawancin bambance‑bambancen da suka shafi iyaka sun zo da p‑value ƙasa da 0.001. Sakamakon VO₂max ne ya fi rauni; saboda haka alamomin iyaka (AT da RCP) sun fi nuna tasirin HMB.
Waɗannan alamu suna da muhimmanci saboda suna nuna yawan aikin da za a iya ci gaba da yi kafin gajiya ta kai kololuwa. Ƙara ƙarfin wuta a AT ko RCP na nufin za a iya riƙe saurin da ya fi ƙarfi na tsawon lokaci – abin da ke da amfani a wasanni masu haɗa juriya, horon nauyi, da kowanne gasa da ke buƙatar ɗorewa da ƙarfi.
Abubuwan Da Ba Su Inganta Ba
Ƙarfafar ƙafafu ta hanyar isometric ba ta nuna wani tasiri ba. Idan ka ɗauki HMB da fatan ƙara ƙarfin tsoka, wannan bincike ba ya ba da wata hujja. Wannan ya dace da tarihin rikice‑rikice kan tasirin HMB a fannin ƙarfi, kuma yana tunatar da mu cewa tallan da ke ƙara ƙarfi ba lallai ya dace da sakamakon auna ba.
Masu Horo Da Marasa Horo
Maza masu horo sun amfana a fannoni da yawa. Marasa horo kuwa sun samu fa’ida kaɗan – kawai a lokacin zuwa RCP (p = 0.001) da ƙarfin wuta a RCP (p = 0.002). Wannan yana nuna cewa marasa horo na iya buƙatar ƙarin zaman HIFT a mako da tsawon lokacin gwaji kafin su ga fa’idar da ta fi girma. A taƙaice, HMB yafi yin tasiri idan an riga an sami horo mai ƙarfi, kuma ba zai iya maye gurbin horo ba.
Lissafin Adadin HMB
Yawancin ƙididdigar HMB na amfani da 3 g a rana ga kowa da kowa. A wannan bincike, an daidaita adadin da nauyin FFM, don haka ya zama na mutum‑ta‑mutum:
Adadin yau da kullum (g) = 0.09 × nauyin FFM (kg)
- 60 kg FFM → kusan 5.4 g/rana
- 70 kg FFM → kusan 6.3 g/rana
- 80 kg FFM → kusan 7.2 g/rana
Mafi yawan mahalarta masu horo (FFM ≈ 71 kg) za su sha kimanin 6.4 g a rana – wato kusan sau biyu fiye da adadin gargajiya na 3 g. Binciken ba ya fayyace yadda za a raba wannan adadi a rana, don haka kada a ɗauka wani rabo daban. Hakanan, dole ne a samu auna nauyin FFM daidai; auna da ma’aunin gilashi ko calipers na iya haifar da kuskure mai yawa, wanda zai shafi adadin da ake sha.
Wa Za Su Iya Amfana Da HMB?
Masu horo masu tsauri – ‘yan wasan CrossFit, sojojin da ke yin aikin ƙarfi, da masu ɗagawa da ke aiwatar da manyan zagayen motsa jiki – su ne suka fi buƙatar wannan kari. Canjin ƙarfin wuta a iyaka da lokacin zuwa iyaka na iya zama abin kima a gare su. 'Yan wasa da ke neman ƙara ƙarfin makami kawai (babban nauyi) ba su da cikakken dalilin ɗaukar HMB. Masu farawa, a gefe guda, ya kamata su fara da samun horo mai tsari kafin su yi ƙoƙarin amfani da ƙari.
Ƙuntatawa Da Bukatar Bincike Na gaba
- Tsawon lokaci: Kowane mataki ya ɗauki makonni uku ne kawai; ba a san yadda tasirin zai kasance bayan dogon lokaci ba.
- Maza kawai: Babu bayanin da ya shafi mata.
- Adadi mai girma: Adadin da aka ƙara ya ninka 3 g da aka saba; ba a tattauna amfanin dogon lokaci ba.
- Sakamako da yawa: Ƙananan p‑values sun nuna kusantarwa amma ba su wakilta sakamakon VO₂max ba; ana buƙatar maimaita gwaji.
- Gwaji guda ɗaya: Bincike ɗaya da ke da kulawa ba ya wakiltar ƙarshe; ana bukatar ƙarin nazari.
Kammalawa
Wannan bincike ya sauya tunanin da ake da shi game da HMB: yana zama ƙarin da ke inganta aikin aerobic ga mutanen da ke horo sosai, baƙi ba da ƙara ƙarfi ga tsoka. Idan kana sha'awar gwadawa, ka yi la’akari da daidaita adadin da ya dogara da nauyin FFM, ka haɗa shi da horo mai ƙarfi, kuma ka auna sakamako ta hanyar gwaje‑gwajen da ke bayyana ƙarfin juriya (misali, VO₂max ko AT). Ka ɗauke shi a matsayin wani alƙawari da ke buƙatar ƙarin bincike mai zurfi da dogon lokaci kafin a ɗauki matsayin hujja ta ƙarshe.
