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A landscape editorial photograph with a modern, clean magazine feel, shot on a pale warm-gray concrete surface in soft natural window light from the left. In the foreground, two matte white ceramic espresso cups sit side by side. The left cup holds a small amount of dark espresso with golden crema. The right cup is filled twice as high. Beside them, two small stainless steel scoops hold fine coffee-colored powder, one half full and one heaped, suggesting a dose comparison without any text or labels. A pair of worn red leather boxing gloves rests slightly out of focus behind the cups, laces loosely draped, with a white hand wrap rolled neatly beside them. A minimalist digital kitchen scale in matte black sits at the edge of the frame, with a few roasted coffee beans scattered across the surface. In the soft-focus background, a boxing gym corner appears: a hanging heavy bag in muted charcoal, pale wood plank flooring, and a tall window with diffused morning light. The palette is warm cream, espresso brown, brick red, and soft slate gray, with gentle shadows and a shallow depth of field. The composition follows the rule of thirds, with the cups and scoops in the lower left third and open negative space on the right for headline overlay. The look is tactile and refined, like a high-end health and performance journal. It has natural grain, subtle contrast, and a calm, confident mood. There are no people, no text, no logos, and no futuristic elements.
Nutrition

Nambah Kafein Kaping Loro Ora Nambah Kuat Petinju—Iki Sing Kedaden

Dr. Gymbro · · 4 min read
#supplements #ergogenic aids #sports nutrition #pre workout #caffeine #boxing #power output

Nambah Kafein Kaping Loro Ora Nambah Kuat Petinju—Iki Sing Kedaden

Ngira yèn nambah siji sendok suplemen pra‑latihan dadi loro bakal mrodhuksi kinerja dobel? Siji uji coba silang anyar karo 15 petinju kompetitif mbandhingaké dosis 3 mg/kg lan 6 mg/kg kafein, lan dosis sing luwih gedhé ora tansah luwih apik. Loro dosis iku mundhakaké dhuwur lompatan lan tenaga ing sajrone 60 menit, nanging dosis 6 mg/kg mung luwih unggul ing sawetara asil kaya push‑up balistik lan torsi dhengkul. Ing ngisor iki tabel konversi mg per kg kanggo bobot awak umum, wektu sing didadèkaké patokan data, lan cathetan penting, kalebu yèn pukulan ora tau diuji.

Apa Sing Ditindakke Para Peneliti

Studi iki diterbitaké ing Journal of the International Society of Sports Nutrition (2026) déning Tuerhongjiang lan tim, nggunakake rancangan uji coba silang acak, double‑blind, lan kontrol plasebo. Limolas petinju lanang, kabèh wis nyukupi standar atlet kelas loro nasional Tiongkok utawa luwih, melu partisipasi.

Saben petinju nindakake telung kondisi kanthi urutan acak, dipisah karo jeda seminggu:

  • Plasebo
  • 3 mg/kg kafein (CAF3)
  • 6 mg/kg kafein (CAF6)

Tim ngukur countermovement jump (CMJ), ballistic push‑up (BPU) lan isokinetic peak torque (PT) saka pundhak lan dhengkul sing dominan. Pangujian dilakoni ing baseline lan ing blok 30 lan 60 menit sawisé konsumsi. Analisis statistik nganggo koreksi Holm kanggo 10 uji interaksi sing direncanakake, supaya nglindhungi saka positif palsu.

Temuan Utama: Loro Dosis Kerja Ing 60 Menit

Ing penilaian 60 menit sing didadèkaké patokan, loro dosis 3 mg/kg lan 6 mg/kg ngungkuli plasebo kanggo dhuwur lompatan CMJ, tenaga puncak, lan tenaga puncak relatif. Ora ana bedane sing signifikan antarane loro dosis kafein.

Kanggo eksplosivitas awak ngisor, dosis 3 mg/kg wis cukup kanggo ngasilaké manfaat sing diukur. Nggandakan dosis ora nambah apa‑apa sing kasat mata ing tes iki.

Endi 6 mg/kg Nuduhaké Keunggulan

Dosis sing luwih dhuwur menang ing sawetara asil:

  • Ballistic push‑up: CAF6 ngasilaké impuls konsentrik, tenaga rata‑rata, lan tenaga puncak sing luwih dhuwur tinimbang plasebo ing 60 menit. CAF3 ora béda signifikan saka plasebo.
  • Torsi ekstensi dhengkul: Iki asil sing paling cetha miturut dosis. CAF6 ngungguli loro plasebo lan CAF3 ing 60 menit.
  • Torsi pundhak: Tenaga fleksi lan ekstensi PT munggah amarga kafein ing wektu tartamtu, nanging ora ana keunggulan dosis sing konsisten.

Penulis nyimpulake manawa pola respon gumantung dosis lan tugas, lan 6 mg/kg ora konsisten luwih unggul tinimbang 3 mg/kg. Dosis sing luwih gedhé mung nambahaké sawetara kemenangan, ora kabèh.

Cheat Sheet mg‑per‑kg

Iki kira‑kira dosis kasebut ing miligram kafein:

Bobot awak 3 mg/kg 6 mg/kg
60 kg (132 lb) 180 mg 360 mg
70 kg (154 lb) 210 mg 420 mg
80 kg (176 lb) 240 mg 480 mg
90 kg (198 lb) 270 mg 540 mg
100 kg (220 lb) 300 mg 600 mg

Priksa label suplemen pra‑latihan panjenengan. Akeh produk nyebutaké 200–400 mg saben sajian, lan sawetara nggabungaké kafein karo stimulan liyané. Yèn panjenengan njupuk loro sendok, kopi, utawa minuman energi, bisa wae wis ngluwihi 6 mg/kg tanpa sadar.

Wektu Paling Pas: 60 Menit Sadurunge Latihan

Pengaruh signifikan ditemokaké ing penilaian 60 menit. Iki dadi jendela wektu sing paling didhukung saka studi iki, mula ngonsumsi kafein kira‑kira sak jam sadurunge sesi latihan cocog karo data. Abstrak negesake blok 60 menit tinimbang 30 menit, dadi aja ngarep‑arep manfaat puncak yen dosis langsung diwènèhi pas wiwit latihan.

Overdosing: Napa Luwih Akeh Ora Tansah Luwih Apik

Studi iki ora nyebutaké efek samping ing abstrak, mula sing kéné mung latar belakang umum, dudu asil saka makalah iki. Dosis kafein sing luwih dhuwur asring katurut karo gemetaran, kecemasan, denyut jantung mundhak, gangguan pencernaan, lan gangguan turu. Kanggo petinju, kakehan energi bisa ngganggu konsentrasi lan pemulihan, lan dosis ing soré utawa bengi bisa ngrusak turu wengi.

Yèn 3 mg/kg wis maringi mayoritas manfaat sing diukur, pindhah menyang 6 mg/kg mung nambah risiko efek samping kanggo keuntungan sing winates. Trade‑off iki bisa layak kanggo asil tartamtu, kayata torsi ekstensi dhengkul, nanging ora minangka upgrade bebas.

Sapa Sing Cocog Karo Dosis Iki

  • Atlet kekuatan‑daya lan kombat sing golek dosis wiwitan sing wajar.
  • Pengangkat lan pengunjung gym sing curiga suplemené kuwat banget.
  • Wong sing sensitif marang kafein, sing duwe alasan apik kanggo miwiti saka dosis ngisor.

Pendekatan praktis yaiku miwiti kira‑kira 3 mg/kg, njupuk sak jam sadurunge latihan, lan mung mundhak yèn ana alasan cetha lan panjenengan bisa nolerake kanthi becik. Respons kafein béda‑bèda antarané individu, mula coba dosis apa wae ing latihan, ora pisanan ing dina kompetisi.

Keterbatasan Sing Perlu Diketahui

  • Pukulan ora diuji. Penulis nyatakaké asil iki minangka bukti kanggo ukuran neuromuskuler sing dipilih, dudu bukti langsung babagan pukulan utawa prestasi tinju kompetitif.
  • Sampel cilik. Limolas petinju lanang iku kelompok sing modest, lan asil ora mesthi ngetrap kanggo wanita utawa tingkat atlet liya.
  • Tes laboratorium. Lompatan, push‑up, lan torsi isokinetik iku ukuran terkontrol, ora kaya pertarungan nyata.
  • Variasi dosis tugas. Bedane antarane dosis gumantung tugas, lan abstrak nyebutake klasifikasi respons individu isih eksploratif.
  • Konsumsi rutin. Abstrak ora nerangake kepiye kebiasaan konsumsi kafein bisa mengaruhi respons, mula toleransi pribadi tetep pitakonan.

Ringkesan

Ing petinju sing wis latihan, 3 mg/kg kafein ningkataké kinerja lompatan sak padha karo 6 mg/kg ing titik 60 menit. Dosis luwih dhuwur mung nuduhaké kauntungan kanggo sawetara asil, utamane push‑up balistik lan torsi ekstensi dhengkul. Sadurunge nambah dosis, itung mg/kg panjenengan, atur wektu kira‑kira sak jam sadurunge latihan, lan elinga yèn durung ana bukti sing nuduhaké iki maringi pukulan sing luwih kuat.

Sumber: Tuerhongjiang et al. Acute effects of 3 and 6 mg·kg‑1 caffeine on strength‑power performance and isokinetic peak torque in competitive male boxers: a randomized, double‑blind, placebo‑controlled crossover trial. J Int Soc Sports Nutr. 2026. DOI: 10.1080/15502783.2026.2743368 | PubMed

Original study

Read the original research on pubmed.ncbi.nlm.nih.gov →

This article summarizes published research for general information. It is not medical advice.

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Dr. Gymbro

Dr. Gymbro writes for Dr. Gymbro: science-backed fitness, nutrition & performance.

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