As has been mentioned, they would need denser muscles to look even remotely human.
The world record for the one hour run is held by Haile Gebrselassie, a 65 kg man who managed to average a speed of 5.9125 m/s over an hour.
If we look at the weightlifting side of things, Eric Spoto weighs somewhere between 140 and 150 kg and managed to benchpress 327.5 kg without special equipment and has mananaged 4 reps with 294 kg.
What I'll do now is estimate how much more energy a man the weight of Eric Spoto would need compared to Haile Gebrselassie in order to run 10 m/s for an hour. I'm (falsely assuming that a 150 kg person generating enough energy would actually be able to perform the feats he can technically do. I'll justify this by handwaving and saying "denser muscles".
When exerting a constant force on a moving object, energy used is proportional to force exerted in the direction of the movement times the magnitude of the movement.
$$
E = F\times\Delta x
$$
Since we can assume the speed is constant, there is no resulting force operating on our athlete. This means that the force the athlete is exerting has the same magnitude as the force he experiences by aerodynamic drag. according to this paper we can approximate the drag working on a human by:
$$
F = AV^{2}
$$
With $A$ being the cross-sectional surface of the human.
Assuming that two humans are to scale versions of eachother, we can get the ratio between their cross-sectional surface as:
$$
\frac{A_{1}}{A_{2}} = (\frac{M_{1}}{M_{2}})^{\frac{2}{3}}
$$
We can now reduce the ratio between energy consumed to known factors:
$$
\begin{align*}
\frac{E_{1}}{E_{2}}& = \frac{F_{1}\times\Delta x_{1}}{F_{2}\times\Delta x_{2}} \\
& = \frac{A_{1}V^{2}_{1}\times V_{1}}{A_{2}V^{2}_{2}\times V_{2}} \textrm{ (Distance covered is proportional to speed)} \\
& = (\frac{M_{1}}{M_{2}})^{\frac{2}{3}} \times \frac{V^{3}_{1}}{V^{3}_{2}}
\end{align*}
$$
Filling this out with the values we have gives:
$$
(\frac{150kg}{65kg})^{\frac{2}{3}} \times \frac{(10m/s)^{3}}{(5.9125m/s)^{3}} = 8.4
$$
That's 8.4 times more energy needed than Haile Gebrselassie used to set his world record, assuming that the lost energy will be proportionally the same.
The good news is that this formula predicts that the required energy scales with "just" $(\frac{M_{1}}{M_{2}})^{\frac{2}{3}}$ this means that doubling the mass only increases the required energy by roughly 1.59 times. This supports that a taller man, bigger person could possibly achieve this. My guess would be that this person would need to be well over 2 meters (approaching the height of the tallest people who ever lived) and weigh at least 300 kg of mostly very dense muscle, eat like a horse and have a heart that's about 3 times bigger in length than a normal person.
