On my mountain bike, I have straight perpendicular extensions at the ends of the bars. With my hands on the extensions, my forearm orientation is pretty similar to that on the bends of my drop bars, but I am not bent over quite as far as on my road bikes. An added plus is that I can quickly and securely grab the ends of my 4-finger motorcycle-style brake handles from the bar extensions.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069