Results Jakarta Marathon 2014

>> October 27, 2014

Jakarta, Indonesia (26 October 2014) "Jakarta Marathon"
-over 14,000 participants from >50 countries
-first three for international marathon received Rp 250 millions (USD 20,750), Rp 175 millions (USD 14,450), Rp 125 millions (USD 10,370) respectively
-first three for national marathon received Rp 115 millions (USD 9,500, Rp 75 millions (USD 6,225), Rp 50 millions (USD 4,150) respectively


Marathon (International)
Julius Seurei (KEN) 2:14:51 
Kennedy Lilan Kiproo (KEN) 2:16:47
Yusuf Songoka (KEN) 2:23:10
Nixon Kipkoech Machicim (KEN) 2:25:50
Hillary Kipchirchir Kimutai (KEN) 2:30:27

Marathon (National)
Agus Prayogo 2:32:27
Hamdan Syafril Sayuti 2:33:31
Ari Swandana 2:36:45
Nikolas da Silva 2:37:11
Sukarno 2:41:49

Half marathon
Joseph Nwangi (KEN) 1:14:12
Silas Muturi Gmchori (KEN) 1:06:16
Collins Kipkorir (KEN) 1:11:13

10km run 
Jauhari Johan 31:41
Ridwan 31:57
Bambang Giyono 33:15


Marathon (International)
Winfridah Nyansikera (KEN) 2:40:25
Mercy Jemutai (KEN) 2:43:17
Elizabeth Jenuyut Chemweko (KEN) 2:43:44

Marathon (National)
Rumini 3:19:05
Merry Paijo 3:22:21
Erni Ulatningsih 3:22:21

Half marathon
Peninan Kigen (KEN) 1:14:24
Edinan Koech (KEN) 1:18:00
Jackline Taziro (KEN) 1:31:20

10km run
Rini Budiarti 37:01
Yulianingsih 38:19
Fery Subnafeu 40:06


What is Rate of Force Development?

>> October 08, 2014

In short, Rate of Force Development (RFD) is the maximal rate of rise in muscle force, which is the speed of force production, or how quickly you can reach peak levels of force.

Look at these situations.

How fast can you move from 0.00 m to 3.00 m distance? ... The time taken can be heavily dependent on your RFD.

How quick can you jump from one point (position) to another point? Note that we are not talking about jump height or distance, but "how quick" ... That is depend on your RFD as well.

How good you are at the execution of "weak or slowest" part of an explosive activity, e.g. initial part of a sprint race (which is the slowest right?) ... Depend on your RFD.

There are many movements that occur very quickly, i.e. below 200 milliseconds. Ground contact in elite sprinters is around 0.100 s, javelin throw release takes about 0.180 s, and so on. These movements are largely influenced by your "ability", or the more specific term is "RFD".

Further enlightenment.

In a sprint race ...
a) your toughest opponent and yourself reacted very quickly (both at 0.13 s)
b) but he makes a gap very quickly
c) about 20 metres into the race, you found he was a metre in front
d) you managed to catch him at the end
e) both crosses the finish line together, you won by 0.001
... regardless the story of your race, he was superior than you at the start. How was it happen? he has a more efficient force application (because he has higher rate of force development) which ensured faster ground contact times at each step.

RED - World class sprinter
BLACK - National class sprinter
BLUE - University class sprinter

The World class sprinter (figure above) is able produce high amount of force within 200 milliseconds, compared to both National and University sprinters. As a result, he (world class) has the capacity to explode and will produce a gap in the next a few metres. We can also say that the national sprinter (black dot) will be slightly ahead of the university sprinter in the next metres because he is able to produce higher force (at the start of movement, in this case 200 ms) than the university sprinter.

How do you measure Rate of Force Development?

This is not as simple as measuring your 1RM bench press. You need to have an extra careful with the method of  measurement of RFD, including instruction (to ask performer to contract "as fast as possible" (during a 5-sec max voluntary contraction test) . Measurement is highly sensitive. When you use the isometric mid-thigh pull (with force plateform), the sampling rate can influence the "actual illustration" of force-time curve (the change in force with time). Thus, a sampling frequency of at least 500 hz may be required. However you can always have alternative. Field test such as movement time assessment can be applied, for instance the 5 m sprint time (although not that accurate, but still is very helpful). Other assessment such as bounding test can give a more representation for activities involving fast stretch shortening cycle (i.e. below 250 ms). Following is the illustration of 30 m bounding test.

1. Ready position on a box (30cm or 40cm).
2. Start by landing on the pre-determined start line (slightly in front, 50cm, of the box).
3. The time must start from first touch, stopped when body crosses line.
4. Determine the number of contact. If the last step involved only "half" step, you can say 0.5 (or 0.2 or 0.8 depend on your judgement).
5. Divide the number of contact with the time.
6. The higher ratio means the better.

The most important to remember in the bounding test is "consistency of measurement". You can also use electronic timing gate to reduce measurement errors, thus increases test sensitivity. Weight bag throw and vertical jump may also be used for RFD assessment. They have quite strong correlation with RFD value from the mid-thigh pull.

Final thought (but no way a final wrap-up of this particular topic!)

You can be very strong ... but this is not the quality that determine how quick you can move, or how fast you can accelerate ... it is how do you use the strength to move, sprint, jump or throw faster. Strength is the ability to produce force. Muscular strength must be further trained in order to become more powerful ... so one of the keys is to develop the explosive strength.

Explosive strength training ... the use of light to moderate equipment/tool or means (e.g. weightlifting snatch, plyometric, throwing exercises).

RFD assessment via the mid-thigh pull can also be used for training monitoring, diagnosis of muscular preparedness, fitness management, and so on.

Regardless of assessment means, please pay attention on consistency and test sensitivity.



100m 9.91 Su Bingtian CHN, Madrid
200m 20.16 Xie Zhenye CHN, Osaka
400m 44.07 Abdalelah Haroun QAT, London
800m 1:45.65 Jinson Johnson IND, Guwahati
1500m 3:34.55 Sadik Mikhou BRN, Paris
5000m 13:01.09 Birhanu Yemataw BRN, Lausanne
10000m 27:38.16 Hassan Chani BRN, Maia
Mar 2:06.11 Yuta Shitara JPN, Tokyo
3000 Sc 8:22.00 Kosei Yamaguchi JPN, Abashiri
110mh 13.36 Ahmad Al-Mouaed KSA, Praha
400mh 46.98 Abderrahman Samba QAT, Paris
HJ 2.40 Mutaz Barshim QAT, Doha
PV 5.71 Xue Changrui CHN, Shanghai
LJ 8.47A Wang Jianan CHN, Guiyang
TJ 17.22 Dong Bin CHN, Eugene OR
SP 20.24 Tejinder Singh IND, Patiala
DT 68.85 Ehsan Hadidi IRI, Chula Vista CA
HT 78.18 Dilshod Nazarov TJK, Chorzow
JT 87.43 Neeraj Chopra IND, Doha
Dec 7948 Keisuke Ushiro JPN, Gotzis
20kmW 1:17:26 Eiki Takahashi JPN, Kobe
50kmW 3:44:25 Hiroki Arai JPN, Taichang
4x100m 37.85 Japan Team JPN, Osaka
4x400m 3:04.05 India Team IND, Gold Coast
RED = World Leader




100m 10.99 Wei Yongli CHN, Resisprint
200m 22.73 Viktoriya Zyabkina KAZ, Almaty
400m 49.08 Salwa Eid Naser BRN, Monaco
800m 2:02.23 Manal Bahraoui BRN, Duffel
1500m 4:11.55 P.U Chitra IND, Guwahati
5000m 15:10.91 Rina Nabeshima JPN, Eugene OR
10000m 31:52.42 Mizuki Matsuda JPN, Yamaguchi
Mar 2:22.44 Mizuki Matsuda JPN, Osaka
3000 Sc 9:10.74 Winfred Yavi BRN, Monaco
100mh 13.08 Wu Shuijiao CHN, Shanghai
400mh 55.54 Aminat Odeyemi BRN, Goleniow
HJ 1.91 Nadzehda Dusanova UZB, Tashkent
PV 4.60 Li Ling CHN, London
LJ 6.64A Xu Xiaoling CHN, Guiyang
TJ 14.25 Olga Rypakova KAZ, Paris
SP 20.38A Gong Lijiao CHN, Guiyang
DT 67.03 Chen Yang CHN, Osterode
HT 75.02 Luo Na CHN, Halle
JT 67.69 Lu Huihui CHN, Halle
Hep 5898 Purnima Hembram IND, Guwahati
20kmW 1:26:28 Qieyang Shenjie CHN, La Coruna



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