Menghitung Kisaran Waktu Finish di Trail Run Tahura 42

Sebuah race yang selalu menarik. Menarik karena tak butuh banyak kualifikasi untuk mendaftar. Jadwal berada di awal tahun dimana banyak orang sedang bersemangat dengan target resolusi masing-masing. Tahura sangat pas dijadikan race transisi dari road ke trail atau sebelum menuju ultra. Makin menarik karena COT-nya sangat longgar selama 10 jam. Dengan menggunakan skala effort, Tahura 42 (Distance 41.4km + Ascent 1280m) adalah 54.2 K, anggaplah 55 K, dengan waktu tempuh maksimal selama 600 menit, kita cukup jogging dengan pace 10 untuk mencapai garis finish sebelum panitia bubar.

https://tracedetrail.com/index.php/en/trace/trace/45552

Itu jika kita tidak nyasar. Bagaimana jika nyasar dan sering berhenti di WS atau foto-foto?

Bermain di avg pace 9 untuk flat 55K atau berarti sekitar avg pace 14-an di Tahura 42 paling aman lah. Banyak yang bertanya, bagaimana jika memiliki catatan waktu FM di road (flat) dengan avg pace 6 atau setara elapsed 4:12 – 4:15, di Tahura 42 nanti berapa proyeksi elapsed hingga finish?

Tahun 2017, trek Tahura 42 lumayan becek dan banyak bekas lumpur mengingat malam sebelumnya diguyur hujan plus sudah dilalui race kategori night trail. Asumsi trek Sabtu (20/1) besok itu kering, Tahura akan sangat runnable. Artinya, akan besar kemungkinan CR milik Abdoullah Mitiche 04:02:16 akan pecah. Apalagi jika menengok entry list peserta ada beberapa nama yang sangat potensial mencapai garis finish sebelum 4 jam termasuk Mitiche sendiri.

Jika Anda mampu berlari flat sejauh 55K dengan avg pace 7:00 berarti elapsednya adalah 385 menit atau setara 6 jam 25 menit
Avg pace 6:30 => 357 menit => 6 jam-an
Avg pace 6:00 => 330 menit => 5 jam 30 menit
Avg pace 5:30 => 303 menit => 5 jam 3 menit
Avg pace 5:00 => 275 menit => 4 jam 35 menit
Avg pace 4:30 => 248 menit => 4 jam 8 menit
Avg pace 4:00 => 220 menit => 3 jam 40 menit

Masalahnya, tak segampang itu memproyeksikan rute trail ke flat. Cara di atas hanyalah cara paling sederhana. Banyak faktor yang mempengaruhi avg pace seperti berapa total tanjakan dan turunan termasuk berapa gradiennya. Makin curam dan panjang tanjakan, pace cenderung makin lambat dan kalori yang dikeluarkan makin banyak. Sebaliknya, makin curam turunan bukan berarti kita akan selalu mendapatkan pace cepat. Semua kembali kepada teknik berlari trail dan power individu dari pelari seperti teknik uphill dan downhill serta endurance juga strength. Banyak tipikal pelari yang kalah di tanjakan, tapi menang di turunan. Juga banyak yang kuat di flat, namun habis saat bertemu tanjakan.

Di strava ada fitur GAP. Fitur ini mencoba memproyeksikan rute trail ke flat. Tentu saja, saat tanjakan akan mendapat hitungan sendiri, termasuk juga saat turunan. Ini pun hanya kisaran versi Strava saja. Dari data Strava milik Abdoullah Mitiche saat Tahura 42 tahun lalu, dia berlari dengan avg pace 5:55 dan avg pace GAP-nya 5:19. Sekadar tambahan catatan, waktu FM road Mitiche di Bogor Sundown Marathon 2017 adalah 02:59:46 atau avg pace 4:15. Sepertinya catatan ini menjadi sesuai dengan skala effort Tahura 42 yang setara 55K flat. Jika di Tahura 42, Mitiche yang sanggup berlari di FM Road dengan avg pace 4:15, mampu mencapai garis finish nyaris 4 jam. Sepertinya Mitiche sangat potensial mampu berlari flat 55K dengan avg pace 4:30.

Pentingnya tempo dalam trail

Menggunakan HRM tentu sangat membantu. Karena parameter detak jantung memang paling relevan sejauh ini untuk mengukur effort kita baik saat melahap rute tanjakan, flat atau pun turunan termasuk berhenti di WS atau nongkrong foto-foto. Banyak kawan yang menggunakan metode lactate threshold untuk race dengan potensi elapsed finish cukup singkat seperti Tahura.

Dan jika melihat Strava milik Abdoullah Mitiche saat Tahura 42 tahun lalu, dia bermain di avg HR sub 160 saja.

https://www.strava.com/activities/840001065/overview

Lap Distance Time Pace GAP HR
1 25.0 km 2:32:38 6:05 /km 5:10 /km 158 bpm
2 15.8 km 1:29:45 5:40 /km 5:35 /km 156 bpm

Sudahkah Anda menentukan target waktu finish di Tahura?

[Featured Photo: Taman Hutan Rakyat DJuanda, oleh Agus Sukaryat]

0 Replies to “Menghitung Kisaran Waktu Finish di Trail Run Tahura 42”

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